10 Celebrities Caught in Big, Fat Lies

Nick Cannon claims that while he briefly dated Kim Kardashian in 2006, she denied the existence of a sex tape from 2003 with her then-boyfriend Ray J. We all know how that one turned out, but we can't exactly say we blame her for this one.

Remember the media hoopla around James Frey, the author of the supposedly autobiographical A Million Little Pieces? And then remember when Oprah handed him his hiney on national television for lying about it all? Yeah. That.

NBC news anchor Brian Williams apparently fudged some details regarding his Iraqi War coverage back in 2003. As it turns out, his helicopter was not shot down by enemy fire, as he repeatedly claimed over the years.

Lance Armstrong used to be our Live Strong hero, but that all came crashing down after it was found out that he had been using performance enhancing drugs.

More from The Stir: Lance Armstrong Lets His Girlfriend Take the Fall for His Hit-and-Run

Not sure if we can call this one a lie or not, considering that Manti Te'o apparently didn't know what was going on ... but the Heisman Trophy finalist and Notre Dame star linebacker caused quite a ruckus after it was found out that his beloved, deceased girlfriend didn't actually exist.

They met on the set of Mr. & Mrs. Smith, but Brad Pitt and Angelina Jolie denied they had a relationship at that point, considering the fact that Pitt was still wed to Jennifer Aniston. The truth eventually came out though, as the parents of six admitted to falling in love on set.

"I did not have sexual relations with that woman" may be the biggest lie ever told. The truth of what happened between Bill Clinton and Monica Lewinsky came out eventually, of course.

While they didn't get her with securities fraud, the Feds did convict Martha Stewart of lying, obstruction of justice, and conspiracy for that insider trading thing in late 2001. She spent five months in jail and five more months on house arrest.

After Chris Brown beat the crap out of Rihanna, he told Larry King that he didn't remember doing it. Her face remembered, though.

OK, we can't blame this adorable couple for lying about their pregnancy for so long, since apparently they wanted to keep it to themselves. That doesn't change the fact that Josh Duhamel and Fergie lied about being pregnant for weeks (months?) before revealing the big news.