Aubrey O'Day Reveals Way Too Much In Skimpy Black Swimsuit!

Aubrey O'Day may have been wearing a one-piece to the pool yesterday -- but that doesn't mean she was covered up!

The "Celebrity Apprentice" star and former Danity Kane member proudly put her cleavage front and center at the Hard Rock Hotel & Casino's weekly pool party, Rehab, in Las Vegas Yesterday.

Wearing a black tiger monokini, O'Day flaunted her curves while sporting an unnatural-looking tan and way too much bronzer.

At least she got rid of her ridiculously red hair, right? Can't win 'em all!

Check out more summer beach and pool party bods in the gallery above.