'American Idol' runner-up Crystal Bowersox

'American Idol' runner-up Crystal Bowersox took to her Twitter account to show off her new smile. "What's NOT missing in this picture?????? Yeah. That's right," she wrote. The singer, who was known for her gap-toothed grin, took a trip to the dentist and it appears she couldn't be happier with the results. Her rep tells PEOPLE that Bowersox decided to fix her pearly whites before going on tour.