08/24/2012 04:19 pm ET

Celebrity Week In Review: Avril Lavigne Is Engaged, Ryan Lochte Parties And More (PHOTOS)

What happens in Vegas stays in Vegas, right? Not if you're It-guy-of-the-moment Ryan Lochte, who partied hard with Prince Harry (though maybe not quite as hard) in Sin City this week.

Who else was in Las Vegas this week? Newly engaged Avril Lavigne, who announced plans to wed Nickelback singer Chad Kroeger on August 21. Didn't know they were dating? Yeah, neither did we.

Those are just a few stories from this week. Here's what else you may have missed:

Celebrity News & Photos