Rapper Chief Keef -- Sued for Child Support ... BY A MIDDLE SCHOOLER

17-year-old rapper Chief Keef is already getting a head start on his baby mama drama -- in fact, he's so far ahead of the game ... he allegedly impregnated a girl who's STILL IN MIDDLE SCHOOL ... and now, she's suing for child support.The girl filed…

Diane Kruger Dido Diora Baird Dita Von Teese