Britney Spears. Courtesy Britney Spears/Instagram Green envy! Britney Spears looked fabulous in a glitzy mini dress. Britney Spears’ Ups and Downs Over the Years Read article The “Toxic” singer, 41, took to Instagram on Monday, February 13, to show off a lime frock as “Push It” by Salt-N-Pepa played in the background. In one clip, Spears rocked a fur shawl draped over her shoulders while shimmying. The strapless piece featured a sweetheart neckline, a beaded design and a sparkly fringe. She team