What is britney spears till the world ends?

Britney Spears' song 'Till the World Ends' was released in 2011 as the second single from her seventh studio album, 'Femme Fatale'. It was co-written by Kesha and produced by Dr. Luke and Max Martin. The song became a commercial success, reaching the top 10 on charts in several countries and being certified multi-platinum in the US, Australia, and Canada.

The accompanying music video featured dance scenes in an apocalyptic setting, with Spears leading a group of survivors in a underground club. The video received positive reviews for its choreography and energy.

In 2012, Spears performed the song as part of her Las Vegas residency show 'Britney: Piece of Me', which ran from 2013 to 2017. 'Till the World Ends' has been regarded as one of Spears' signature songs, and a quintessential party anthem of the early 2010s.