Las Vegas was already buzzing with celebrity power when the 2026 iHeartRadio Music Festival opened at T-Mobile Arena on Friday night. But as the first night moved toward its final moments, one group had the crowd waiting for something much bigger: BTS was preparing to take the stage together.

The two-night festival, presented by Capital One, has brought together major names from pop, hip-hop, rock, country and K-pop, creating a packed weekend that stretches beyond the arena itself. And while Cardi B delivered a headline-making set and Muse added a completely different musical edge, BTS ultimately had the final word on opening night.

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BTS turns the first night into a major K-pop moment

The biggest surprise for many fans came when BTS closed the first night of the 2026 iHeartRadio Music Festival.

RM, Jin, Suga, J-Hope, Jimin, V and Jungkook returned to the stage together, giving fans the chance to see the full group performing at T-Mobile Arena in Las Vegas.

Rather than simply making a brief appearance, BTS served as the closing act for the first night and performed songs from its newest album, ARIRANG. The group’s set became one of the defining moments of the opening night, with the arena erupting as the seven members took over the stage.

iHeartRadio described BTS’ performance as a “fiery set”, while official photos from the event captured the scale of the group’s return to the festival stage.

The performance also provided ARIRANG with another major live showcase in the United States. With BTS performing at one of Las Vegas’ biggest venues and closing the first night, the album received a major spotlight in front of a large festival audience.

For fans who could not make it to T-Mobile Arena, BTS’ return was also part of a much larger broadcast event. iHeartMedia carried the festival through radio stations across the country, allowing audiences outside Las Vegas to follow the action.

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BTS, ARIRANG and the opening-night schedule

Date	Event	Location	Official Details
September 18, 2026	2026 iHeartRadio Music Festival opening night	T-Mobile Arena, Las Vegas	BTS closed the first night and performed songs from ARIRANG
September 19, 2026	Second night of the festival	T-Mobile Arena, Las Vegas	Remaining performances continue across the festival’s second night

The timing made BTS’ appearance particularly significant within the structure of the festival. The group was not simply another name on an enormous bill. It was the act that brought the first night to a close.

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Cardi B brings a red-hot performance to Las Vegas

Before BTS delivered its closing set, Cardi B had already given the audience plenty to talk about.

The rapper appeared in a sparkling zebra bodysuit with red fringe and moved through a set built around some of the biggest songs in her career.

Her performance included “WAP,” “Bodak Yellow,” “Up” and “AH HA.” She also performed collaborations including “Finesse,” “I Like It” and “Taki Taki.”

The set continued with “Hello,” “ErrTime,” “Bodega Baddie” and “Pretty & Petty,” giving Cardi B the chance to move through different parts of her catalogue during one of the festival’s most energetic performances.

But the appearance came at an interesting point in Cardi B’s career plans, with the rapper already discussing what could come next beyond the iHeartRadio stage.

Just one day before the festival, Cardi B spoke during an X Spaces session about her upcoming music plans. She revealed that she had been discussing her next moves with people helping her develop what she has planned.

“I have been in talks with a couple of people that are helping me with what I got going on,” she said during the session. “I have so many ideas and so many things are being written.”

That was not the only tease.

Cardi B also discussed the possibility of a massive touring run in 2027, describing it as a “humongous tour” that she hopes will match the scale of her recent Little Miss Drama Tour.

That means her iHeartRadio appearance arrived during a particularly busy period, with the rapper working on plans for what comes next while continuing to perform for major live audiences.

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Muse adds a rock-heavy twist to the 2026 iHeartRadio festival

The festival’s appeal goes well beyond pop and hip-hop.

Muse is one of the major rock acts on the 2026 lineup, giving the weekend a very different sound from the performances delivered by BTS and Cardi B.

The English rock band joins The Smashing Pumpkins and Weezer as part of the festival’s rock contingent. At the same time, country, K-pop and hip-hop artists occupy other sections of the lineup.

That genre-hopping format is central to the event. A global K-pop group can close one night, a major hip-hop performer can command the stage earlier in the evening, and a rock band can shift the entire atmosphere somewhere else.

For the 2026 festival, that variety is visible throughout the lineup.

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The 2026 iHeartRadio Music Festival lineup has plenty more to offer

While BTS, Cardi B and Muse have emerged as major talking points from the opening night, they are only part of the full festival bill.

The announced lineup includes:

• BTS
• Benson Boone
• Cardi B
• Ciara
• Goo Goo Dolls
• Kenny Chesney
• Lainey Wilson
• LE SSERAFIM
• Major Lazer
• Muse
• Snoop Dogg
• The Smashing Pumpkins
• Weezer
• Zara Larsson
• Stella Lefty, who is featured in a special performance

Ryan Seacrest is hosting the festival.

LE SSERAFIM’s inclusion adds another major K-pop presence alongside BTS, while artists including Snoop Dogg, Major Lazer, Ciara and Benson Boone keep the event moving across different genres.

Kenny Chesney and Lainey Wilson also bring country representation to the bill, while the Goo Goo Dolls, The Smashing Pumpkins, Muse and Weezer strengthen its rock presence.

The result is a festival that refuses to stay inside one musical lane.

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Fans can step inside the iHeartRadio House of Music

The festival experience also extends beyond the main arena.

The iHeartRadio House of Music presented by Hyundai gives fans another way to experience the event in Las Vegas. The free experience features immersive rooms inspired by some of the festival’s biggest performers, including BTS, Cardi B, Kenny Chesney and Zara Larsson.

The House of Music is open from 4 p.m. to 1 a.m. PT on both festival days.

Importantly, fans do not need a ticket or wristband to visit.

That gives people another way to connect with the festival even without entering T-Mobile Arena. For BTS fans, the dedicated experience also adds another part of the group’s presence in Las Vegas beyond its closing performance.

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How to watch the 2026 iHeartRadio Music Festival

The scale of the festival extends well beyond the people inside T-Mobile Arena.

The 2026 iHeartRadio Music Festival is being broadcast live each night through iHeartMedia radio stations across more than 150 markets nationwide.

For audiences watching online, Disney+ and Hulu are the official streaming destinations, with the performances livestreamed each night exclusively for subscribers.

The live broadcast begins at 7:30 p.m. PT / 10:30 p.m. ET each night.

That means fans across the country can follow the festival as it happens, even without being in Las Vegas. The event is also continuing to generate coverage across social media and iHeartRadio’s official channels as performances unfold.

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Saturday’s second night keeps the festival moving

The opening night may have ended with BTS taking over the stage, but the 2026 iHeartRadio Music Festival is not finished.

The festival continues on Saturday, September 19, with the remaining performances scheduled at T-Mobile Arena.

Artists including Snoop Dogg, Lainey Wilson, LE SSERAFIM, Weezer and The Smashing Pumpkins remain part of the weekend’s lineup, alongside the other announced performers.

That gives the second night its own collection of major acts while keeping the same cross-genre format that defines the festival.

With Ryan Seacrest hosting and the event continuing across radio, streaming and the Las Vegas fan experience, the festival remains much larger than the performances happening inside the arena.

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BTS and Cardi B leave the opening night with the biggest moments

The first night of the 2026 iHeartRadio Music Festival ultimately delivered two very different kinds of spectacle.

Cardi B brought a hit-heavy performance featuring “WAP,” “Bodak Yellow,” “Up,” “AH HA,” “Finesse,” “I Like It,” “Taki Taki,” “Hello,” “ErrTime,” “Bodega Baddie” and “Pretty & Petty.” She also arrived with fresh discussion surrounding her plans for new music and a potential “humongous tour” in 2027.

Then BTS took the closing position and transformed the final stretch of the night into a major group moment, with RM, Jin, Suga, J-Hope, Jimin, V and Jungkook performing songs from ARIRANG together at T-Mobile Arena.

Muse, meanwhile, represents the rock side of a festival that continues to move between musical worlds, while the remaining lineup promises even more major performances during the second night.

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Conclusion

The 2026 iHeartRadio Music Festival opened with exactly the kind of star-packed, genre-crossing spectacle its Las Vegas setting promised. Cardi B brought her biggest hits and teased what could come next, Muse added a powerful rock presence, and BTS closed the first night with a fiery performance from ARIRANG.

With the second night continuing on September 19 and audiences able to follow the festival through iHeartMedia radio, Disney+ and Hulu, the weekend is still unfolding. For the opening night, however, the defining images came from BTS returning to the stage together and Cardi B turning T-Mobile Arena into another showcase for her growing list of major performances.

Disclaimer: This article has been prepared based on thorough research of the sources provided for the original verified material, including iHeartRadio’s official festival coverage, performance reports, viewing information and lineup announcements, as well as iHeartMedia’s official announcement. The article reflects the information available from those provided sources as of September 19, 2026, and does not imply independent verification beyond that material. Performance details and festival highlights may be updated as iHeartRadio releases additional official footage, photographs and reports from the second night.

Sources

• iHeartRadio — Inside BTS’ iHeartRadio Music Festival Takeover
• iHeartRadio — BTS’ Fiery Set at the 2026 iHeartRadio Music Festival
• iHeartRadio — Cardi B Brings the Drama in Red-Hot Set
• iHeartRadio — 2026 iHeartRadio Music Festival: How to Watch & Listen
• iHeartMedia — 2026 iHeartRadio Music Festival Lineup Announcement
• iHeartRadio — 2026 iHeartRadio Music Festival Lineup Revealed
• iHeartRadio — Official 2026 iHeartRadio Music Festival Coverage

Featured Image Credit:

• Big Hit Entertainment / HYBE LABELS