It's hard to believe it's been over a decade (let that sink in) since we've been introduced to Kelly Clarkson, who earned the title of first-ever American Idol winner back in 2002. Following the inaugural win, Clarkson continued to make waves with her countless hit singles, impressive vocal range, charismatic personality, and ever-changing hairstyles. In fact, the new mom has quite a range of tresses on her beauty resumé. Clarkson, who rings in her 33rd birthday today, has experimented with icy hues, auburn shades, and drastic cuts. In honor of her birthday, we're taking a look back at the Grammy winner's standout hair moments, from high school to present.