Britney Spears tweeted a snapshot of herself holding her perfume on Sunday, but who cares about smelling like the pop star -- we're obsessing over her newly-dyed brown locks!

The 32-year-old singer wrote, "Spice up Valentine's Day by getting 'Naughty & Nice' ((pun intended))." Based on photos we've seen of Brit on Instagram at her residency in Las Vegas, she darkened her hair sometime over the last few days.

Though Britney has rocked all sorts of different hairstyles over the years (from bald to blonde to brunette, we love 'em all!), just last February she went dark after her split from fiance Jason Trawick, but she only lasted about a month or two before she went back to her signature golden tresses. Wonder if she plans on keeping this dye job a bit longer?