This past weekend's iHeart Radio Festival in Las Vegas offered up a slew of unforgettable performances including a surprise appearance by Pink during No Doubt's set.

It's no secret that Pink has a rock 'n' roll attitude so joining Gwen Stefani and the boys on stage was the perfect fit as the two ladies traded lyrics and sang each others praises throughout the performance of No Doubt's signature tune from their 1995 album, Tragic Kingdom.

The most difficult part of the video is deciding who rocked the better blonde mohawk, Pink, or bassist Tony Kanal who is no stranger to the singer as he played bass on her album, Funhouse in 2008 and joined her on world tour that followed in 2009.

*Be warned, Pink being Pink, drops one F-bomb toward the end of the performance.