Carrie Underwood & Steven Tyler Do ACMA's

Singer Carrie Underwood performed with Steven Tyler at the 46th Annual Academy Of Country Music Awards held at the MGM Grand Garden Arena on April 3, 2011 in Las Vegas, Nevada.I thought that he was going to kiss her in the mouth at first,but Carrie pulled back quickly,thank goodness!She didn't sound as good as she usually does when she sings 'Undo It' live.More Underwood after the jump.. 

Photos: Ethan Miller/Getty Images North America