Kenny Chesney won entertainer of the year for the third time at the Country Music Association Awards on Wednesday, while former American Idol sensation Carrie Underwood's won single of the year.

Chesney, who also took the association's top honour last year and in 2004, was humble in his acceptance.

"I can't believe that I get to stand on the stages that I stand on every summer and get to sing the songs that I sing," the star said. "I love country music and I love doing what I do."

Carrie Underwood, who got her start in country music by winning reality TV's Idol, won for female vocalist and single of the year, for Before He Cheats.

"God has blessed me with so many wonderful things," said Underwood, who also won the female vocalist award last year. "If you told me a few years ago I had been nominated with the people I'm nominated with, I would have called you absolutely insane."

Brad Paisley, who won male vocalist, teared up as he thanked his father, who he said carried amplifiers and ran sound "even though he didn't know what he was doing."

"I can't tell you what this means to me to win this. I always wanted to win this award at least once — this will do," said Paisley, who also won music video for his hit Online.

Earlier, Sugarland won vocal duo of the year, breaking Brooks & Dunn's long-standing lock on the award, and 17-year-old Taylor Swift won the horizon award for newcomer.

Rascal Flatts won top vocal group, and George Strait took top album for It Just Comes Natural.

Brooks & Dunn had won the duo category 14 of the last 15 years, including the last six in a row.

Rascal Flatts' Gary LeVox thanked country radio for "being our mouthpiece."

Strait had said that of his five nominations, which tied him with Paisley for the most of the night, he wanted to win the album trophy the most.

"When we made this album it was incredible," Strait said afterward. "We had great material and just kept knocking them out. We ended up with 15 songs and never intended to put 15 songs on the record, but when I started going through the songs there was none I could take off."

Strait's hit Give It Away won song of the year.

Other winners included Tracy Lawrence, featuring Tim McGraw and Chesney, for musical event for Find Out Who Your Friends Are; and dobro great Jerry Douglas of Union Station as musician of the year.

"This was something that we all wanted to sing," Lawrence said of the hit. "It was something that was in our wheelhouse. I think we all related to it."

Paisley performed Online with the Brentwood, Tenn., High School marching band. Other performers were Underwood, Rascal Flatts, Miranda Lambert, Strait, Swift, Alison Krauss & Union Station, Big & Rich, Rodney Atkins, Brooks & Dunn, Sugarland, Martina McBride, Keith Urban, Chesney, Josh Turner, Kellie Pickler and the Eagles.

Vince Gill introduced the Eagles, who played their single How Long and received a standing ovation.

"For 35 years or more, these next guys have been writing songs like we wished we could write," Gill said.

Rascal Flatts opened the show with the title track to its latest album, Still Feels Good, while a montage of country stars flashed on large screens behind them, including a photo of Dolly Parton and Porter Wagoner. Wagoner died last week of lung cancer.

Dwight Yoakam also paid tribute to Wagoner, calling him a pioneer and a groundbreaker to the end.

The show was broadcast live on ABC and was hosted by James Denton of Desperate Houswives, Kate Walsh of Private Practice and Kimberly Williams-Paisley — Brad Paisley's wife — of According to Jim.