Taylor Swift and Miranda Lambert were the big winners at last night's Academy of Country Music Awards in Las Vegas. Swift won the night's top award, Entertainer of the Year, and Lambert won Top Female Vocalist of the Year as well as Song of the Year, Single of the Year and Video of the Year for her hit "The House That Built Us Me." Also, Brad Paisley won Top Male Vocalist for the fifth consecutive year, Lady Antebellum won Album of the Year for Need You Now and the Band Perry won both Top New Artist and Top New Vocal Duo or Group.

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The show included a number of memorable performances, including a few collaborations that paired country artists with pop singers.



Here's a clip of Rihanna performing her new single "California King Bed" as a countrified duet with Sugarland singer Jennifer Nettles.



In this performance, American Idol season 4 winner Carrie Underwood teams up with current American Idol judge Steven Tyler for a show stopping medley of Underwood's rocker "Undo It" and the Aerosmith classic "Walk This Way."

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