I get a kick out of songs where a word is rhymed with itself:
"I don't got a motor boat,
but I can float your boat."
-Timbaland, The Way I Are
"Wonder why all these playas tryin' to holla at her,
Soon as she go to the bathroom, playa I'm goin' holla at her"
-R. Kelly, I'm a Flirt
I especially enjoy dances:
Named after food (ie, Tootsie Roll, Chicken Noodle Soup),
That sound like rides (Electric Slide),
and
That are wholesome but sound naughty (the Hand Jive).