Katy Perry let the world know who she was voting for when she rocked out at a campaign rally for President Obama in Las Vegas on Wednesday. Find out what the President had to say about the "Teenage Dream" singer! Plus, Kanye West took dressing down to a new level when he wore sweatpants to a Versace party in NYC, and we're taking a look at some of the funniest tweets of the week. Which celeb tweet made you LOL? Let us know on Facebook or Twitter!
Check back weekdays at 12 p.m. PT
More Celebrity Features on Yahoo!: