It was a big night for Lady Antebellum, Miranda Lambert and Carrie Underwood at the 45th annual Academy of Country Music Awards (Sun., 8PM ET on CBS). Nominated for seven awards, Lady Antebellum took home three: Top Vocal Group, Single Record of the Year and Song of the Year for "Need You Now".

Watch the video after the jump. It was a big night for Lady Antebellum, Miranda Lambert and Carrie Underwood at the 45th annual Academy of Country Music Awards (Sun., 8PM ET on CBS). Nominated for seven awards, Lady Antebellum took home three: Top Vocal Group, Single Record of the Year and Song of the Year for "Need You Now".

Lambert also won three, including Top Female Vocalist. And Underwood made history as the winner of ACM's new category, Entertainer of the Year. In her emotional speech, she apologized to Brad Paisley's wife Kimberly Williams-Paisley. Check out the video to find out why.