Nicki Minaj isn't scheduled to hit the road with Britney Spears until June, but it looks like the two have started their collaboration early. Minaj and singer Ke$ha have both jumped on the remix to Spears latest single 'Til the Worlds Ends,' off her 'Femme Fatale' album.

The track, which leaked to the 'Net Friday (April 22), a few days earlier than the official release date, puts a new spin on the song, with the addition of the added girl power. Minaj comes swinging out the gate, addressing an unnamed female hater -- most likely to be Lil' Kim. "Chimpanzees is hatin', but I take it all in stride," she spits. "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."

Going in and out of different character voices, the Young Money Barbie accelerates her flow from sluggish to rapid before showing off a whole new personality while taking one more possible jab at Kim. "What? You tired, you need a break? You was hot when? Ricki Lake."

Since announcing Minaj as the opening act on her tour, Spears and the rapper have been getting pretty close. Spears stopped to hang with Minaj at the after party for her I Am Still Music tour stop in Los Angeles over the weekend.

The Femme Fatale tour kicks off June 16 in Sacramento.

Listen to Nicki Minaj on Britney Spears' 'Til the World Ends' Remix