"Till the World Ends" is an uptempo dance-pop and electropop song with an electro beat.
The song features a chant-like chorus, and lyrics in which Spears sings about dancing until the end of the world.
The video was also nominated for two categories at the 2011 MTV Video Music Awards, and went on to win Best Pop Video.
Spears has performed "Till the World Ends" on television shows Good Morning America and Jimmy Kimmel Live!, and performed it with Minaj at the 2011 Billboard Music Awards.
The bit was compared by Scott Shettler of AOL to the "rapid word repetition" of Kesha.