It's been 10 years since Britney Spears and Justin Timberlake ended their three-year romance and it was all downhill from there.

To be fair, it was uphill for Timberlake, while Spears has spent the past decade on a roller coaster of highs and lows. The 30-year-old star is currently at a bright spot once again with a hosting gig on "The X Factor," a stable relationship and a personal fortune estimated at more than $200 million.

But last month, Leon Gladstone, the attorney representing the singer's parents in a defamation case against Sam Lutfi, told the court that it was after her relationship with Timberlake "ended painfully" that they began to notice a change in their daughter. According to the lawyer, prior to the relationship with Justin, Britney was a "ray of light," but after the breakup she became "angered and depressed."

Following the breakup, Timberlake broke things off with his boys in *NSYNC, and went on to a very successful solo career. While the split may have led Spears on a downward spiral, it helped Timberlake distance himself from a bubblegum boy-band pop image, and gave him the inspiration to launch his career in whole new direction.

The split clearly changed both their lives, so we had to wonder what would -- or wouldn't -- have happened if Britney and Justin never broke up?

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  • Justin Timberlake & Britney Spears

    Justin never would have <a href="">done that SNL skit where he admitted to taking Britney's virginity. </a>

  • Justin never would have written "Cry Me A River"

  • Britney's first marriage wouldn't have lasted 55 hours.

  • Britney never would have married Kevin Federline

  • Justin never would have helped Janet Jackson have a "wardrobe malfunction" at the 2004 Super Bowl.

  • Justin never would have dated Cameron Diaz.

  • Justin never would have brought "Sexy Back" (because it never would have gone away).

  • Britney never would have attacked the paparazzi with an umbrella.

  • Britney wouldn't have had a disastrous "comeback" performance at the 2007 VMAs.

  • Britney never would have been engaged to Jason Trawick.

  • Jessica Biel, Justin Timberlake

    Justin never would have married Jessica Biel.

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