36-year-old Britney Spears is in amazing shape! <br />The "Toxic" singer showed off her tight tummy in an Instagram selfie on Friday. <br />Brit Brit posed with a gym in the background, wearing a peach bra top and shorts. <br />Her caption was playful: "Found my white booty shorts"<br />Britney is not afraid to show off her fit figure on social media. <br />The superstar regularly shares photos and videos of her intense workouts. <br />Weeerk it-Brit! <br />
