Rihanna, Steven Tyler, Taylor Swift Wow Country Music Awards 2011

Rihanna and Taylor Swift took centre stage at the Academy of Country Music Awards in Las Vegas on Sunday (April 3).

The ceremony, at the MGM Grand Garden Arena, was dominated by Mirana Lambert, who took home four awards.

Swift was named Entertainer Of The Year – and told the crowd she was “just losing my mind” as she collected her award.

"The fact that this is from the fans makes it so special,” Swift, who was visibly moved, added.

Lady Antebellum - the trio of Hillary Scott, Charles Kelley and Dave Haywood - followed on from their recent Grammy Awards success taking home three prizes.

The ceremony also featured performances from Rihanna, who sang her single 'California King Bed' with Sugarland's Jennifer Nettles, and Aerosmith's Steven Tyler.

Twilight actor Robert Pattinson also appeared at the ceremony. You can see a selection of highlights from the Country Music Awards below in pictures.

Country Music Awards - 2011