Britney Spears went down hard during her Las Vegas show falling so hard mid-song . it was up in the air whether she”d stay down or go on with the show.She did both staying down, and dancing from her backside. Brit Brit rolled her left ankle pretty good, but managed to keep going.She stayed seated on the stage momentarily after the fall, but was helped up by fellow dancers to finish the finale. Later she wrote on Twitter: “Thank you for all of the sweet wishes! Had a little scare on stage tonight with my ankle but I’m OK.