Designer Sherri Hill teamed up with American boy band Forever In Your Mind Saturday for a concert at SxSW.

Kicking off prom season, 120 guests including fans, influencers and SxSW VIPs attended the high-energy event, held at Sherri Hill's headquarters in Austin, Texas.

 Forever In Your Mind The members of Forever In Your Mind took over Sherri Hill’s headquarters in Austin, Texas, during SxSW. Photo: Max Burkhalter

The guys in Forever In Your Mind, Emery Kelly, Ricky Garcia and Liam Attridge all rocked stylish ensembles by Ben Sherman for the concert. 

Forever in Your Mind Forever in Your Mind's debut EP "FIYM" was released on Hollywood Records, July 1, 2016. Photo: Max Burkhalter

Sherri Hill is known for having a star-studded fan base. Selena Gomez, Laura Marano, Ryan Newman, Bella Thorne, Victoria Justice, Ariana Grande, Olivia Holt, Olivia Culpo, Miranda Lambert and Paris Hilton have all been spotted in her designs. Kendall and Kylie Jenner, Hailey Baldwin, Delilah Belle Hamlin and Sadie Robertson have even walked in her runway shows.

Kendall Jenner, Sherri Hill, Kylie Jenner Kendall Jenner, designer Sherri Hill and Kylie Jenner walk the runway at the Evening Sherri Hill Spring 2013 fashion show during Mercedes-Benz Fashion Week at Trump Tower Grand Corridor in New York City. Photo: Taylor Hill/Getty Images