Obama vows to "rally the world" against Islamic State
In his weekly radio address, U.S. President Barack Obama says the United States and a broad coalition of nations are coming together to combat the threat posed by Islamic State. Rough Cut (no reporter narration).
Following the alleged bust-up between Chris Brown and Drake's entourages, here's a look at a few other famous celeb rivalries! Mariah and Eminem, Kim Kardashian and Jon Hamm, Jen Aniston and Angelina Jolie, Jon Stewart and Glenn Beck.