Britney Spears' new single, 'Till The World Ends'

Britney is indeed back! Spears released her new single, "Till The World Ends," this morning on the Ryan Seacrest radio show. The track is off of her highly anticipated album, "Femme Fatale," that drops March 29.

The pop star boasts that this album is her best work yet. The song is very laid back with a nice echoing effect on her voice. Her vocals are seductive with a techno twist.

Is this song a hit? Check out the track below and leave your thoughts.