Sean “P. Diddy” Combs and Henry Louis Gates Jr. on Finding Your Roots
PBS screenshot

In Tuesday’s new episode of Finding Your Roots on PBS, hip-hop heavyweights LL Cool J and Sean "P. Diddy" Combs learn stunning facts about their lineage.

Fresh off his Grammy-hosting gig, LL Cool J (born James Smith) is floored to learn that the woman he's known as his maternal grandmother actually isn't related to him, and Diddy is stunned to find that his third great-grandfather was born in Maryland a free man. 

"Make no mistake about it, man, this is not typical of the black experience," host Henry Louis Gates Jr. tells Diddy. "For 90 percent of the African-American people who sat where you’ve sat when I’ve done their family tree, no free ancestors."

Watch a sneak peek below: