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 15) at Sunset Tower in West Hollywood, Calif.

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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.

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