What does TTWE mean in Unclassified?

Till the World Ends

Till the World Ends is a song recorded by American singer Britney Spears for her seventh studio album, Femme Fatale (2011). It was written by Kesha Sebert, Lukasz "Dr. Luke" Gottwald, Alexander Kronlund, and Max Martin. Gottwald, Martin and Billboard produced the song, while vocal production was handled by Emily Wright. "Till the World Ends" is an uptempo dance-pop and electropop song with an electro beat. It opens with sirens, and has elements of trance and Eurodance. The song features a chant-like chorus, and lyrics in which Spears sings about dancing until the end of the world. "Till the World Ends" received universal acclaim from critics, who deemed it a catchy dance track and complimented its anthemic nature. "Till the World Ends" was treated with different remixes, most notably the Femme Fatale Remix, featuring rapper Nicki Minaj and Kesha, which was released on April 25, 2011. The remix adds a rap by Minaj at the beginning, new vocals by Kesha, and a dubstep breakdown. The Femme Fatale Remix received positive reviews from critics, with most complimenting the diversity of the group and Minaj's rap. "Till the World Ends" attained international success, charted on the top-ten in several major music markets, including Australia, France, Ireland, New Zealand, Sweden and Switzerland. Spears solo version reached number eight on billboard hot 100. The Femme Fatale Remix propelled the single to the top five on the Canadian Hot 100 and the US Billboard Hot 100.

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