Britney, Nicki & Kesha together "Til The World Ends (Remix)".

This is a killer remix!, is going to blow up easily .... Britney was smart bringing Nicki and Kesha to add more energy to the song, the intro is sick, Nicki's rap is hot and kesha taking over the chorus changes the sound of the song and i like the fact that they change the original production.

Listen.