WORLD PREMIERE: Ariana Grande 'Problem' feat. Iggy Azalea Listen to Ariana Grande on iHeartRadioAriana Grande has teamed up with Iggy Azalea for her latest single, "Problem." She's been teasing the song with snippets over the past week, but we're thrilled to finally bring you the entire thing!Check out the iHeartRadio World Premiere of 'Problem' on demand below! What do you think of the song? Comment below!