Snooki, Kristin Cavallari, and 18 More Reality TV Stars Who Made It Big (PHOTOS)

When Glee star Heather Morris moved from Scottsdale, Arizona, to L.A., she got her first taste of the limelight on Season 2 of So You Think You Can Dance, narrowly missing the Top 20. Despite the setback, Heather landed a coveted backup dancer gig with Beyonce on her world tour and a plethora of other performances throughout 2008. Her first encounter with Glee was as a guest choreography coach, a gig that happily led to the role of airheaded cheerleader Brittany Pierce.