Britney Spears just dropped her birthday outfit on Instagram and it’s not what you’d expect! She rocked a super cute off-shoulder polka-dot minidress (with a black bow, of course) and black boots, totally channeling Minnie Mouse. She even admitted she’s obsessed with the new Minnie cartoon and feels like she’s 5 again. Britney’s still got it, and her playful style is giving us major nostalgia! #Beauty #BritneySpears #BirthdayLook