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Carrie Underwood and Steven Tyler rock a duet

LAS VEGAS, NV - APRIL 03: Singers Steven Tyler (L) and Carrie Underwood perform onstage at the 46th Annual Academy Of Country Music Awards held at the MGM Grand Garden Arena on April 3, 2011 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) *** Local Caption *** Steven Tyler;Carrie Underwood
Ethan Miller
Steven Tyler and Carrie Underwood perform onstage at the 46th Annual Academy of Country Music Awards on April 3, 2011, in Las Vegas.
Getty

"American Idol" met "American Country Music" Sunday night when country music's elite gathered in Las Vegas to honor their own at the the 46th Annual Academy of Country Music Awards.

Pictures: The ACM red carpet
Pictures: ACM ceremony highlights
Special section: Awards season

One of the highlights of the two-hour ceremony, broadcast live on CBS, was a duet between country music's "it" girl Carrie Underwood and "American Idol" judge and Aerosmith frontman Steven Tyler.

The two blasted though her "Undo It" and the segued ino Aerosmith's "Walk This Way" with a bit of strut and swagger.

Underwood, an early "American Idol" winner even had a scarf tied to her mic in an homage to the rocker. Tyler tossed phrases - and a few air kisses - at Underwood in a performance that brought down the house.

Click here to see the performance.