Britney Spears Drops Official 'Till The World Ends' Remix

New track with Nicki Minaj, Ke$ha follows leaked version, plus Brit tweets single's cover art.

Just days after it was leaked on Friday, Britney Spears and her femme fatales, Nicki Minaj and Ke$ha, dropped their official remix of "Till the World Ends."

The new version of the song was produced by Dr. Luke and Dream Machine. Brit half-whispers " 'Till the World Ends' remix" before the beat kicks in and Nicki hits her verse hard. She spits fierce lines like, "Sniff, sniff, cries/ I done slayed your whole entire f---ing life."

Then Britney's sex-kitten vocals kick in for the song's first verse. "That's Britney, bitch! I'm Nicki Minaj and that's Ke$ha," the Queens MC declares before K sings the chorus. The beat is harder, the loops are sassier and the song is grimier than the original version, which was the second single from Femme Fatale. The newly added dubstep portion takes the one from "Hold It Against Me" to a new level by adding in bass-heavy synths.

Ke$ha, of course, wrote the track for Britney, and the ladies certainly don't seem to mind sharing the spotlight with each other. The official track isn't much different than the version that leaked over the weekend, though Spears did have something brand-new to share with her fans just as the song dropped on iTunes and streamed on her website.

Spears tweeted the artwork for the single, which features the original press photo of Spears along with separate photos of Nicki on the left and Ke$ha on the right. Spears wrote, "@NickiMinaj @Keshasuxx Too much fierceness for one cover! Thanks for lending your voices girls... #TTWEREMIX — Brit"

Spears and Minaj have been hanging out a lot in the lead-up to their summer tour. They hung out at the Factory nightclub on Friday night after Minaj's show in Los Angeles. Spears later wrote, "Early rehearsal after a late night with my girl @NickiMinaj. Can't WAIT to get out on the road with you."

What do you think of the "Till the World Ends" remix? Tell us in the comments!