Kelly Clarkson's weight ups and downs have been making headlines since she became the very first American Idol back in 2002, but the beauty world has always paid close attention to her hair.

These days, the "Stronger (What Doesn't Kill You)" singer, 30, finds herself at the top her of game with a hit album, (Stronger) a new beau (Brandon Blackstock), and a new look: a slimmed-down bod and sunny blonde hair.

"People keep asking me if I am having more fun, being blonde, but I always have fun! Whether I'm blonde, redhead, or brunette! I always have fun, dammit!" the Duets judge told Us Weekly back in July.

In the video above, two of Us' resident experts -- Beauty Director Gwen Flamberg and Senior Music Editor Ian Drew -- reminisce on Clarkson's hair evolution through the years.

From the "TV anchor blowout" she rocked upon winning Idol in 2002 to her bombshell waves during her Breakaway days circa 2004, Clarkson -- and her hair -- have come a long way.

Watch the clip now and tell Us: Which Clarkson look is your favorite?