Rookie girl group HARTZ TO HEARTZ just made a strong impression with their first-ever U.S. festival performance.

🎤 From Seoul to SoCal: A Dream-Like Debut on the American Stage

On May 11 (KST), HARTZ TO HEARTZ performed at the iHeartRadio Wango Tango 2025 music festival in Huntington Beach, Los Angeles. The event, hosted by the largest radio network in the U.S., featured global pop icons like Meghan Trainor, Gwen Stefani, Doja Cat, and David Guetta.

The group delivered energetic performances of their debut tracks The Chase and Butterflies, earning cheers from the American crowd. "It feels like a dream to be performing in the U.S. for the first time," they shared.

🦋 June Comeback Hints During iHeartRadio Interview

HARTZ TO HEARTZ also revealed exciting news backstage. During an interview with radio station 102.7 KIIS FM, they hinted at their upcoming June comeback, saying, "We're working hard to show fans a whole new side of us."

🌟 Next Stop: SMTOWN LIVE 2025 in LA

The group continues to ride their momentum with another major appearance lined up — they'll take the stage at SMTOWN LIVE 2025 in LA on May 12.

[Photo Credit: SM Entertainment]