Carrie Underwood Joins Stones on Stage [VIDEO]

Another show, another guest performer with the Rolling Stones.

Keeping with their '50 and Counting' tour tradition, country star Carrie Underwood was rockin' & rollin' with the Stones. Over the weekend she sang along with Mick to 'It's Only Rock n' Roll' at Toronto's Air Canada Centre.

She took to Twitter to share her excitement about the gig.