Listen to P!nk on iHeartRadio | Listen to No Doubt on iHeartRadio

Talk about blonde ambition! P!nk joined the legendary No Doubt on stage at the iHeartRadio Music Festival at the MGM Grand Las Vegas. P!nk came out shocking the audience, even doing some push-ups on the stage before rocking out. The mohawk-rocking singer joined rock star Gwen Stefani in singing a No Doubt classic "I'm Just a Girl."

They may be just girls, but they have some big voices, at one point even screaming loudly in unison during the song. Both ladies of rock proved that two blondes are better than one!

Click here for full coverage of the 2012 iHeartRadio Music Festival