"Undo It" is a song written by Carrie Underwood, Kara DioGuardi, Marti Frederiksen, and Luke Laird.

Underwood performed the song at the 2010 American Idol finale, as well as at the 2010 CMT Music Awards.

"Undo It" has sold 1.6 million copies in the United States, making it the 7th biggest song of her career.

"Undo It" was ranked number 29 on Billboard's year-end charts for Top Country Songs.

Juli Thanki of Engine 145 gave the song a thumbs-down, calling it "a third-rate tune from Kelly Clarkson’s reject pile" and saying that it had "deeply stupid lyrics.

"[5] Roughstock critic Matt Bjorke rated the song two-and-a-half stars out of five, saying that it had "catchy repeatable lyrics" but concluded his review by saying "she can do so much better.

"[7] Billboard critic Deborah Evans Price was more positive in her review, comparing it to the "vengeful Carrie persona" of "Before He Cheats" and saying that it had "crisp, compelling" production.

[8] Kevin John Coyne of Country Universe gave the song an A− calling Undo It a short, sweet, and undeniably catchy song which features both “We Will Rock You” drum riffs and twangy fiddle, as if those two things together are as natural as peanut butter and chocolate.

[citation needed] Underwood performed the song live for American Idol's season finale on May 26.