The Toxic hitmaker fell while performing her hit (You Drive Me) Crazy during her Piece of Me residency at the Planet Hollywood resort, and in video footage posted online, Spears struggled to get back up and needed the assistance of her dancers.

She later took to Twitter.com to assure her fans she was fine and wrote, "Thank you for all of the sweet wishes! Had a little scare on stage tonight with my ankle but I'm ok!"

However, the injury seems to be more serious than the pop star made it seem, as officials from Caesars Entertainment confirmed on Thursday (30Apr15) that the upcoming shows scheduled for Friday and Saturday (01-02May15) have been cancelled.

A joint statement from the singer and bosses at the Planet Hollywood Resort & Casino in Las Vegas reads: "Britney injured her ankle during her performance Wednesday evening and her doctor has advised her not to perform Friday and Saturday evening so that she may heal."

The cancelled gigs are expected to be rescheduled.