Miranda Lambert, the Zac Brown Band and Alan Jackson are among the early winners at the 46th annual Academy of Country Music Awards in Las Vegas. The winners in two categories were announced prior at the MGM Grand Garden Arena prior to Sunday night's (April 3) awards show telecast on CBS. Lambert triumphed in the video of the year category for "The House That Built Me." Director Trey Fanjoy and producer Trent Hardville were also honored for their work on the video. The Zac Brown Band's collaboration with Alan Jackson on "As She's Walking Away" won in the vocal event category. The victory also netted an award for Keith Stegall and a second for Brown for co-producing the track.