Britney Spears is back to "Work" ... bitch.

The singer just released some brand new promo artwork for her upcoming single, "Work Bitch," which drops on Monday.

Sporting a showgirl outfit and posing in front of a mini-Las Vegas sign, it's pretty clear the 31-year-old is also teasing a big announcement about her upcoming Sin City show.

We gotta say, this is the best Britney's hair has looked in a longgggggg time.

That outfit, however, isn't doing her any favors. We're pretty sure there's sheer fabric over her chest, giving it a distorted appearance.

Over the weekend, Spears shared some sexy photos from her new single's music video shoot -- where the mother of two showed off her very impressive bikini bod.

The song will premiere next Monday at 6pm ET and will hit iTunes at 12:01am on Tuesday, the same day she'll appear on "Good Morning America."

We're ready for some new songs from Spears ... are you?

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