P!nk surprised fans at the 2012 iHeartRadio Music Festival at the MGM Grand Garden Arena when she jumped on stage and joined Gwen Stefani singing on ‘Just A Girl”.

Pink later tweeted, “I just got off stage from the raddest surprise performance with No Doubt. [Gwen] really is that cool. #imjustagirl.”

Watch the YouTube video of Pink and No Doubt singer Gwen Stefani perform “Just a Girl” at iHearRadio Festival September 21, 2012: