The Chainsmokers Join Nicole Scherzinger & Jessica Szohr at Wheels Launch in LA

The Chainsmokers are celebrating the launch of Wheels!

The duo – Drew Taggart and Alex Pall – gave a surprise performance at the launch of the bike-share app on Thursday night (March 14) at Sunset Tower in West Hollywood, Calif.

PHOTOS: Check out the latest pics of Nicole Scherzinger

They were also joined at the event by Nicole Scherzinger and Jessica Szohr.

Other attendees included Kelly Osbourne, Larsa Pippen, Delilah Belle Hamlin and Chantel Jeffries, who also DJed during the evening.

Earlier in the evening, The Chainsmokers also attended the iHeartRadio’s Music Awards, where they took home Best Dance Album.