Song From The Hot Chick ! please ? (:?

it plays every time it shows Rob Shnider's character , when he is a
guy .
like after he robs the gas station and he is in his house eating
nachos and its in the back round its a really funky beat , maybe from
like the 70's

and its also when he changes into the girl and he is in his house and
he goes to pee but he doesn't have a penis.
thanks so much !