Britney Spears, "Till the World Ends" (2011)
Femme Fatale marked a huge comeback for Britney Spears on the pop charts, and "Till the World Ends" played a key role in re-establishing the pop star as the genre's princess. "That song is me imagining her and any female musician touring the world," Kesha said in an interview. "You know, when you go out, and you're having an amazing, magical night and you don’t want to go to sleep and you want it to last until the world ends." Later, Spears released a dubstep remix of the song featuring Kesha on the chorus and Femme Fatale tour opener Nicki Minaj offering a "Monster"-esque verse at the song's beginning.