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Sir Mix-A-Lot is opening up about the behind he had in mind when he created his "Baby Got Back."

The rapper tells TMZ that Jennifer Lopez's rear-end was the inspiration for the 1992 hit. Apparently, Mix was ahead of the curve when it came to noticing J-Lo's famous backside. It first caught his eye while she was a Fly Girl on the sketch comedy series "In Living Color" back in the early 1990s.  

Well, J.Lo's booty may have looked fly in the '90s ... but it still looks amazing today!

Photo: Getty Images