Chris Kelly - a.k.a. Mac Daddy - from 90's rap duo Kriss Kross was pronounced dead earlier today from a suspected drug overdose. He was 34.
Kriss Kross were known for dressing backwards as well as their most famous single 'Jump'.
I was not a fan but I remember seeing them live at the Smash Hits Poll Winners Party, in the UK, back in 1992.
Here is a video someone else posted of that event: