"American Idol" alum Carrie Underwood has stolen America's heart once again after appearing at the 54th Grammy Awards Sunday in a sequined white gown.

The country music star wore a boat neck, long-sleeve dress by designer Gomez-Gracia. The gown hugged Underwood's body closely but was very modest, revealing only a portion of the singer's back.

The biggest names in music gathered at the awards ceremony, and Underwood, 28, took the stage alongside Tony Bennett.

Bennett, who performed at the very first Grammy Awards, returned for the 54th show Sunday, saying it never gets old.

"I've been on every single one that we've had through the years," said Bennett of the awards on Friday after rehearsing with Underwood.

"And what I love about it … this is the only place where all the performers get together in one weekend, and it's so great to see old friend and new guys that are coming up," the 85-year-old crooner told The Associated Press.

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SEE VIDEO OF CARRIE UNDERWOOD GRAMMY 2012 DRESS

He and Underwood performed a duet of the classic tune "It Had to Be You."

Of Bennett, Underwood said he was "America's most enduring artist."

Alternately, Bennett described his singing partner as "beautiful," and said "she sings great and she's so popular."

Backstage, after the performance, the "I Left My Heart in San Francisco" singer continued, "It's just a wonderful experience to be on the show."

Underwood rose to fame as the winner of the fourth season of "American Idol" in 2005 and has since becoming a prominent artist. The Grammy Award-winner is a platinum-selling singer best known for her hit songs such as "Jesus Take the Wheel" and "Before He Cheats," to name a few.

The 2012 Grammy's on Sunday also saw performances by Lil Wayne, Rihanna, Nicki Minaj, The Foo Fighters, and many others. The night saw the return of Adele following her throat surgery as well as a special tribute for the late singer, Whitney Houston.