|N/A||Till the World Ends|| Hold It Against Me|
| Britney Spears|
|Released||March 4, 2011|
|Format||CD single, digital download|
|Producer||Dr. Luke, Max Martin, Billboard|
"Till the World Ends" (stylized as till the world ends) is a song by American recording artist Britney Spears. It was released as the second single from her seventh studio album, Femme Fatale. "Till the World Ends" was leaked on March 3, 2011, and was released for digital download the following day."Till the World Ends" received mostly positive reviews, with critics calling it a catchy dance track and complimenting its anthemic nature.
In an interview with Spin on February 11, 2011, Kesha announced she had co-written a song with Dr. Luke and Max Martin titled "Till the World Ends" for Femme Fatale. On March 2, 2011, the single's cover art, in which Spears appears sitting on a couch in a sweater and heels, was posted at Deezer.com."Till the World Ends" leaked online on March 3, 2011, which prompted Spears to post hours later on her Twitter account, "Looks like the cat's out of the bag..."During an interview with Seacrest, Spears described "Till the World Ends" as "fun. I like it. It's good energy. [...] I'm a vibe person, and I think I love good-mood songs, and if it puts me in a good mood, it clicks for me."
The Femme Fatale Remix of the song, featuring rapper Nicki Minaj and Kesha, was released on April 25, 2011. The remix adds a rap by Minaj at the beginning, new vocals by Kesha and a dubstep breakdown. "Till the World Ends" became a commercial success, peaking inside the top ten in sixteen countries including Australia, Canada, France, New Zealand and the United States. The Femme Fatale Remix propelled the single to the top five in Canada and the United States.