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Ariana Grande is pretty much problem-free at the moment. The 20-year-old singer’s latest single, “Problem,” is currently tearing up the charts after an impressive debut at no. 3 on the Billboard Hot 100. And she’s been promoting it like crazy.

The latest stop on her promotional tour? 102.7 KIIS FM’s 2014 Wango Tango music festival on Saturday (May 10) in Los Angeles. Ariana was joined on stage by Iggy Azalea to perform their hit “Problem” — and it’s the first time the two have performed together since the single’s release!

Of course, her Iggy Azalea has a lot to be celebrating, too. Not only did she just drop her debut album, The New Classic, but her single “Fancy,” with Charli XCX, is currently no. 4 on the Billboard Hot 100, right behind her track with Ariana. Talk about total domination!

Watch the sexy performance below!


What do you think of Ariana and Iggy's Wango Tango performance? Sound off in the comments!

Crystal Bell is an editor at Wetpaint Entertainment and our resident fangirl for all things Pretty Little Liars. Follow her on Twitter and Google+!