Sir-Mix-A-Lot must be one happy man — 'cause these ladies got back!
Serena Williams is used to having all eyes on her on a tennis court — but with her new sexy booty selfie, also known as a "belfie," fans were forced to do a double take.
She captioned the a$$ shot, “Look back at it.” Believe us — we are!
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No wonder so many people are getting plastic surgery on their butts — when you’re looking at people like Serena, it’s hard NOT to be envious!
Check out our gallery of eight other big booty celebs who rival this booty queen!