Jason Wahler

No one can resist a bad boy, and Jason Wahler is the ultimate in this category. The two dated on and off for a year in 2005, and we think it's safe to say that nothing good came out of the relationship. Not only was Jason caught kissing his ex, Jessica, Lauren even gave up an awesome summer gig in Paris for this dud. We're hoping Lauren learned her lesson and is steering clear from guys like him. Good riddance!

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