10 Things You Don't Know

The most unbelievable, surprising and OMG things about Brad Pitt, from his steamiest movie scenes to his shocking pre-fame jobs.

The most unbelievable, surprising and OMG things about J. Lo, from how she prepared for "Hustlers" to how she changed the internet forever.

The most unbelievable, surprising and OMG things about Tiffany Haddish, from the celebrity that changed her life to a crazy job she had before she was famous.

The most unbelievable, surprising and OMG things about Keanu Reeves, from the story behind his famous name to where all of his Matrix money went.

The most unbelievable, surprising and OMG things about Lady Gaga, from her famous name to why scientists are studying her.

The most unbelievable, surprising and OMG things about Will Smith, from how he met Jada to the true story behind his Fresh Prince paychecks.

The most unbelievable, surprising and OMG things about Rihanna, from her encounters with the spirit world to her iconic Met Gala dress.

The most unbelievable, surprising and OMG things about Robert Downey Jr, from how he became Iron Man to his famous celebrity roommates.

The most unbelievable, surprising and OMG things about Oprah Winfrey, from how she got her Oscar nomination to how she and Gayle really became BFFs.

The most unbelievable, surprising and OMG things about Matthew McConaughey, from the night he met his wife to how he changed his life to win an Oscar.

The most unbelievable, surprising and OMG things about Reese Witherspoon, from all the secrets behind Legally Blonde to what really happened on the set of Friends.

The most unbelievable, surprising and OMG things about Jennifer Lawrence, from her famous Oscar moment to her love of reality TV.

The most unbelievable, surprising and OMG things about Kevin Hart, from his first time doing standup to a different crazy career he almost had.