It’s Britney and Barbie, bitch. Britney Spears links with her tourmate Nicki Minaj on the official remix to “Till the World Ends,” also featuring the song’s writer Ke$ha. “Chimpanzees is hatin’, but I take it all in stride/ Put her in a jungle with bananas on the side/ Told you they’d revive your career, but somebody lied/ I ain’t talkin’ poultry when I say this chicken’s fried,” fires Nicki. Let the femme fatales rock your world below.