LE SSERAFIM Makes iHeart Festival History for K-Pop

Billboard reports LE SSERAFIM's Saturday set makes them the first K-pop girl group ever to play the iHeartRadio Music Festival in Las Vegas.

According to Billboard, the 2026 iHeartRadio Music Festival will make history by featuring the first K-pop girl group in the event's run, with LE SSERAFIM taking the stage on Saturday, September 19 at T-Mobile Arena in Las Vegas. iHeart's own festival guide confirms LE SSERAFIM on the bill alongside BTS, Cardi B, Benson Boone, Ciara, Goo Goo Dolls, Kenny Chesney, Lainey Wilson, Major Lazer, Muse, Snoop Dogg, The Smashing Pumpkins, Weezer and Zara Larsson, plus a special performance by Stella Lefty. Ryan Seacrest returns as host for the two-night event, which runs Friday, September 18 and Saturday, September 19, presented by Capital One.

The festival has historically booked pop, hip-hop, country and rock heavyweights, and Billboard's framing stresses that the 2026 lineup 'spans pop, K-pop, hip-hop, country, rock and dance' — with LE SSERAFIM singled out as the historical first among girl groups. For a devoted K-pop readership, the milestone lands in the same weekend BTS headlines Friday night, meaning the festival's two days bracket both the genre's biggest boy band and its newest girl-group breakthrough. iHeart notes fans have been 'buzzing across social media' about BTS's Friday set, a signal of how much attention the genre is commanding on the festival's biggest stage this year.

Both outlets confirm the livestream details: the festival airs live on Disney+ and Hulu beginning at 7:30 p.m. PT / 10:30 p.m. ET each night. Billboard reports the Disney+ and Hulu bundle costs $12.99 per month with ads or $19.99 ad-free, and notes DirecTV offers a five-day free trial for its streaming plans as a free route to the same feed. iHeart adds a free audio option: the festival will be broadcast live each night via iHeartRadio stations across more than 150 markets. Tom's Guide says viewers outside the U.S. will find no official broadcast in Canada, the U.K. or Australia beyond iHeartRadio's apps and YouTube highlights, and suggests a VPN for subscribers traveling abroad.

According to iHeart, fans heading to Las Vegas can visit this year's iHeartRadio House of Music presented by Hyundai, a free fan experience inspired by the performing artists. It features immersive rooms dedicated to BTS, Cardi B, Kenny Chesney and Zara Larsson, with interactive artist and brand rooms exploring the performers' lives, music and passions. iHeart says the space is open to the public on September 18 and 19 outside T-Mobile Arena from 4 p.m. to 1 a.m. PT — no ticket required, which extends the festival's reach well beyond the seats inside.

With LE SSERAFIM's Saturday set closing out the weekend, the milestone arrives as Billboard also lists Zara Larsson and Stella Lefty among the announced acts, underscoring how globally the 2026 bill is drawn. Tom's Guide points international fans to the official iHeartRadio YouTube channel for free performance clips, interviews and highlights after the fact, while iHeart promises continued live performance coverage, memorable moments and more from BTS's highly anticipated Friday appearance. For K-pop watchers, the question after this first is how quickly other girl groups follow onto one of America's biggest festival stages — but for now, per Billboard, LE SSERAFIM holds the distinction alone.