She's been called The Queen of POP... but the sales nosedive of Madonna's latest album MDNA has tarnished the crown.
Katy Perry has equalled a record set by Michael Jackson! Perry is celebrating the fifth number one single off the same album... a record currently only held by Michael Jackson! The singer's latest track, "Last Friday Night" (T.G.I.F.) joins Teenage Dream, California Gurls, Firework and E.T as number one hits.