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Britney Spears - Till The World Ends; written by Lukasz "Dr. Luke" Gottwald, Alexander Kronlund, Max Martin and Kesha Sebert. 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. Gerrick Kennedy of the L.A Times called the song "catchy''.