WATCH: Ariana Grande Is ‘Problem’-atic at the 2014 iHeartRadio Music Awards

Ariana Grande stunned at the iHeartRadio Music Awards and Rihanna clearly enjoyed the show. Ariana pulled out all the stops getting a little sexy on stage with her backup dancers.

As Rihanna watched from her seat, she smiled, giggled, and seemed to really like Grande’s performance. Grande ended up performing her latest hit song “Problem” and the crowd ate it right up.