Britney Spears just dropped a mirror selfie in a white polka dot mini dress, and fans are obsessed! She rocked the look for her birthday, channeling full-on Minnie Mouse energy (boots and all). In her caption, she even confessed she’s been binge-watching Minnie’s new cartoon. Who else is loving this playful throwback? Swipe to see the dress that’s got everyone talking! #Beauty #BritneySpears #BirthdayLook