The fourth installment of Christina Retrospective on The Voice's YouTube channel was uploaded Friday, revealing Christina Aguilera's favorite lyric from her touching song Beautiful.

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Aguilera hit the pop scene with the catchy hit Genie in a Bottle in 1999, but the pop star changed up her look and sound when she released her album Stripped in 2002.

On Stripped, the powerful and touching pop ballad Beautiful is famously featured.

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In the fourth installment of Christina Retrospective, which can be watched below, Aguilera revealed her favorite lyric from this song and gave an explanation.

"There's a line in the song Beautiful that in the bridge embraces imperfections," Aguilera shared before reciting the lyric.

"No matter where we go. No matter what we do. We're the song inside the tune. Full of beautiful mistakes," Aguilera recited, adding, "And 'beautiful mistakes' is such a contradiction, but such a complimentary juxtaposition of an amazing meaning with so much sentiment and something that's so relatable I think worldwide."

Beautiful earned Aguilera a Grammy for Best Female Pop Vocal Performance in 2004.

"When I perform that song and I sing those lyrics I truly feel connected to everybody I'm trying to sing to," she shared.

"And I feel that connection no matter where I'm at in the world," she added.

"We all do have insecurities and imperfections that truly make us unique and beautiful and they should be celebrated so I love singing that line," Aguilera dished.

Tune in on Mondays and Tuesdays starting at 8 p.m. ET for Season 8 of The Voice on NBC.

Tags: The Voice nbc television Christina Aguilera