Britney Spears Shows Off Bikini Body in 3 New Instagram Videos: Watch

Britney Spears photographed on Feb. 13, 2015 at Planet Hollywood in Las Vegas.

Britney Spears is up to something. The pop star posted three sexy new videos to her Instagram account Monday (Jan. 25) without any explanation, but she knows how to get us wondering.  

Britney Spears Shares Rehearsal Footage From Revamped 'Piece of Me' Las Vegas Show

The black and white clips show Spears seductively posing and writhing around in a black bikini set to a soundtrack of Nathaniel Rateliff & The Night Sweats' "S.O.B."

Britney Spears 'Feelin Better' in New Yoga Pic -- Plus More Celebs Get Fit in 2016

Spears is supposed to be revamping her Las Vegas show Piece of Me next month, so maybe this is related. 

Watch the videos here: