Britney Spears was her own worst critic on Monday after posting footage of herself belting out her hit track, Oops!...I Did It Again, which she released back in 2000.While it has been six years since her last live performance, the 41-year-old pop star provided her more than 41.6 million Instagram followers a rare video of her singing. 'Most of this sounds pretty flat … but I liked DOING IT AGAIN,' the Grammy winner captioned the recording, which featured just her vocals as the camera pointed to the ceiling.
She continued: 'Wait OOPS...That was so lame... I know!!!'The performer went on to tell fans to kiss her 'fucking a**' and 'stay classy' before proceeding to post some topless shots of herself in bed.
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