We debuted a new song this morning called Just Stand Up. They're calling the group Artists Stand Up To Cancer. It features 15 of the biggest female singing stars in the world right now, people like Leona Lewis, Beyonce, Mariah Carey and Rihanna. If you heard it, tell us what you think. If you didn't hear it, keep listening over the weekend and then come back and tell us what you think of Just Stand Up.