Brunette-ney is back!

Britney Spears showed off her brand new brunette locks on Facebook last night, sharing a photo of herself sitting at a vanity backstage at her Las Vegas show.

"Spice up Valentine’s Day by getting ‘Naughty & Nice’ ((pun intended))," she wrote along with the pic -- clearly hocking another one of her perfumes.

Her hair very well could be a wig, as she wears a collection of them during her gig at Planet Hollywood and was seen sporting a similar look during this weekend's shows.  

But, wig or not, we're loving this look on Spears. She always looks better when she goes to the dark side and steps away from the bleach for a bit.

What do you think of the look? Vote in the gallery above!

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