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/ Source: TODAY
By Rebekah Lowin

Ever since she stole our hearts back in 2005 on "American Idol," Carrie Underwood's hair has been a source of fascination and inspiration. And, of course, she has been one of our girl crushes since then, too.

Her music is killer, her style is bold and daring and she seems like an incredible mom to her adorable baby boy, Isaiah, born February 2015. Oh, and there's more. She's sold over 58 million records. She's married to hockey hunk Mike Fisher. And to top it all off, she's probably in the best shape of her life.

She even has her own clothing line.

RELATED: Best drugstore hair products from the People and TODAY Beauty Awards 2016

Honestly, it's tough to choose just one aspect of the songstress' life that ranks above the others. But let's get back to the subject at hand: her hair. (Seriously, Carrie Underwood, you're killing it.)

We've been obsessing over those bouncy curls and sleek-straight locks for years now and, somehow, they just keep getting better.

RELATED: For Carrie Underwood, a powerful body goes with her powerful voice

When we first met this vocal powerhouse, she was auditioning for "American Idol" with bouncy curls and an even more endearing attitude. How could she not become America's sweetheart?

Through the years, we've watched her grow and mature — and become a style icon in her own right. Click through the above to see how her hair has evolved over her years in the spotlight!