Katy Perry, your reign is over! Billboard magazine named LMFAO's "Party Rock Anthem",  the biggest hit of summer 2011.

Runners-up included Pitbull's "Give Me Everything", Adele's "Rolling in the Deep", "Super Bass" by Nicki Minaj, and "Last Friday Night (T.G.I.F.) by, you guessed it, Katy Perry, whose hit "California Gurls" was the biggest hit of the summer of 2010.