JUST ADDED: 5 Seconds of Summer will be rocking the stage at this year's iHeartRadio Music Festival Village in Las Vegas! The band sat down with Ryan Seacrest to break the news. Click here to buy your tickets now, before they sell out!
Ariana Grande performed “Popular Song” with Mika on Monday’s “Dancing with the Stars.”
The show’s pros did an impressive dance routine while the pair sang their hit.
Check out the video below!