Is Jennifer Lopez a more powerful celebrity than Oprah Winfrey?

Forbes Magazine seems to think so. The singer-actress took the No. 1 spot on their annual Celebrity 100 list, a ranking of the most powerful people in entertainment. Lopez beat out numerous other A-listers for the title including last year's recipient Winfrey (No. 2), Katy Perry (No. 6) and Britney Spears (No. 10). Even more impressive is that J-Lo clocked in at No. 50 on last year's Celebrity 100 list.

Want to know why J-Lo made it to the top of the list this year? Find out after the jump.

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!