Kelly Clarkson burst onto the scene in 2002 after winning the first season of American Idol. In the years since, she's turned her overnight reality success into an impressive career, married her manager's son, Brandon Blackstock, and welcomed her first child, a daughter named River. On Wednesday, Kelly announced that she's pregnant with her second baby at an LA concert, where she also wowed the crowd with her cover of Demi Lovato's "Cool For the Summer." In her nearly 15 years in the spotlight, Kelly has been fearless with her looks, changing up her wardrobe and her hairstyle more times than we can count. Take a look back at the singer through the years when you start scrolling.