Tim McGraw was noticeably absent from Sunday's ACM Awards, even though he was scheduled to perform on the broadcast. McGraw's publicist confirmed to Entertainment Weekly that the singer's management team pulled him off the show, due to a "major disagreement" with ACM producers. It's not clear what the two sides were clashing over, but EW reports that it was possibly over production design.

McGraw, pictured left rehearsing Saturday on the ACM stage, walked out of rehearsals, giving ACM producers one day to fill his shoes. His performance slot was given to Blake Shelton, and Sugarland were added as last-minute presenters, likely taking the spot of McGraw and/or his wife, Faith Hill.

McGraw is still scheduled to perform on tonight's ACM Artist of the Decade tribute to George Strait.

2009 ACM Awards Red Carpet Photos

    Singer Kellie Pickler arrives at the 44th annual Academy Of Country Music Awards held at the MGM Grand on April 5, 2009 in Las Vegas, Nevada.

    Jason Merritt, Getty Images

    Marisa Miller arrives at the 44th Annual Academy of Country Music Awards in Las Vegas on Sunday, April 5, 2009.

    Jae C. Hong, AP

    Singer Martina McBride arrives on the red carpet at the 44th annual Academy Of Country Music Awards held at the MGM Grand on April 5, 2009 in Las Vegas, Nevada.

    Frazer Harrison/ACM2009, Getty Images for ACM

    Musician Taylor Swift arrives at the 44th annual Academy Of Country Music Awards held at the MGM Grand on April 5, 2009 in Las Vegas, Nevada.

    Jason Merritt, Getty Images

    Singer LeAnn Rimes arrives on the red carpet at the 44th annual Academy Of Country Music Awards held at the MGM Grand on April 5, 2009 in Las Vegas, Nevada.

    Kevin Winter/ACM2009, Getty Images for ACM

    Singers Chuck Wicks and Julianne Hough arrive at the 44th annual Academy Of Country Music Awards held at the MGM Grand on April 5, 2009 in Las Vegas, Nevada.

    Jason Merritt, Getty Images

    Musician John Rich arrives on the red carpet at the 44th annual Academy Of Country Music Awards held at the MGM Grand on April 5, 2009 in Las Vegas, Nevada.

    Frazer Harrison/ACM2009, Getty Images for ACM

    Singers Blake Shelton and Miranda Lambert arrive at the 44th annual Academy Of Country Music Awards held at the MGM Grand on April 5, 2009 in Las Vegas, Nevada.

    Jason Merritt, Getty Images

    Actress Nicole Kidman and Musician Keith Urban arrive at the 44th annual Academy Of Country Music Awards held at the MGM Grand on April 5, 2009 in Las Vegas, Nevada.

    Jason Merritt, Getty Image

    Singer Carrie Underwood arrives at the 44th annual Academy Of Country Music Awards held at the MGM Grand on April 5, 2009 in Las Vegas, Nevada.

    Jason Merritt, Getty Images

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