carrie underwood steven tyler getty 520 ACM Awards 2011: Carrie Underwood fends off Steven Tyler's advances during epic 'Walk This Way' duetWhoa.

For us, Carrie Underwood is almost always the highlight of any country music affair, so when she took the stage at the Academy of Country Music Awards on April 3, it seemed like the night was bound to peak just a bit too soon.

Then Steven Tyler strutted on stage, and it was official.

Tyler joined Underwood for the second half of her song “Undo It,” before the two “American Idol” stars tackled the duet to end all duets: “Walk This Way.”

The singing? Fantastic. The synchronized moves? Adorable. Tyler’s persistent attempts to get a kiss from Underwood? Comedy gold.

Only Carrie Underwood could fend off the big-lipped-one’s pleas for smooches in front of millions and not even break a sweat.

Posted by:Mikey O'Connell