Week in Pictures: Celeb Couples Celebrate Valentine's Day

When it comes to Hollywood's hottest couples, love isn't always in the air (even on Valentine's Day). While star lovers like Kim Kardashian and Kanye West, andKaty Perry and John Mayer enjoyed romantic evenings out on the town on Feb.14, there appeared to be trouble in paradise for Chris Brown and Rihanna, who avoided each other at a club that night after canoodling earlier in the week at the Grammys.  And those weren't the only celebs who topped our galleries this week. Take a look at our latest star snaps for more! »