The Rolling Stones have always had a thing for country. So who better to invite onstage with them on their 50th anniversary tour than Taylor Swift ?
The country superstar was the surprise guest of the legendary rockers' concert at Chicago's United Center Monday night, joining Mick Jagger for a touching duet of the Stones' timeless 1965 classic "As Tears Go By."
The ballad was one of the first songs the frontman and sidekick Keith Richards wrote together. It became a hit for British singer Marianne Faithfull in 1964 before the World's Greatest Rock and Roll Band scored with it the following year.