Jennifer Lopez is THE most powerful celebrity this year, at least according to Forbes!

The American Idol judge topped Forbes Celebrity 100 list, beating out Oprah and Justin Bieber. Talk about tough competition!

Find out what other stars rounded out the top 10 after the jump!

All the stars from the FOX network came together on Monday night at the station's Upfronts for the fall of 2012, and with all the recent starpower added due to casting changes on The X-Factor, Monday's event was one we were all highly anticipating!

Of course, several Glee stars, who will be starting their fourth season in the fall, were in attendance, while Britney Spears and Demi Lovato, the newest members of The X-Factor cast, and newcomers to the FOX Upfronts, fit right in with the rest of the crew. Click through the gallery to check out all the hot pics from Monday night!

Is The X-Factor about to get even MORE star-studded!? With the recent confirmation of the addition of Britney Spears to the judging panel, Simon Cowell is only looking to fill one more spot to join himself and L.A. Reid for the second season of the U.S. singing competition -- and there are some big names being thrown out as to who it might be!

Most recently, teen stars Demi Lovato and Miley Cyrus have been rumored to be joining the show. According to The Hollywood Reporter, Simon is looking to bring a younger audience to watch the show, so the addition of either of these young ladies would be the perfect fit for that demographic.