Monica, Katy Perry and Ciara also celebrate this week.
Check out Andre 3000, Rihanna, Lady Gaga, Kanye and more.
Bootsy Collins tells fans Bobby Womack is battling stage 1 of the disease.
R&B singer Raheem DeVaughn opens up about his involvement in the Occupy movement and how it has changed his life.
Plus pics of Beyoncé, Aretha Franklin and more.
The rappers participate in collaborative art show.