Britney Spears shows off her toned physique in all kinds of super stylish swimwear, modeling her favorite looks in an Instagram video.On Monday, October 19, the 38-year-old posted two videos to Instagram showing off some of her hottest, barely-there swim styles.In the first video, the “Toxic” singer rocks a green snakeskin print number, which she explains is the same one she wore to the beach three days prior. “But I said hey, why not give it another shot,” she says.