Biz Markie, rapper and 'unsung hero' in Hip Hop, dead at 57

Biz Markie, rapper and 'unsung hero' in Hip Hop, dead at 57
Musician and comedian Biz Markie, best known for his 1989 hit "Just a Friend," has passed away, his spokesperson told E! News. He was diagnosed with diabetes in 2011, according to ABC News.