Taylor Swift, at the tender age of 23 can't have much left to do on her "bucket list"!

Let's see...perform with one of the most iconic rock bands of all time? Been there, done that!

The Rolling Stones are arguably the most iconic rock band ever, and their status in the music world has attracted some pretty interesting guest appearances during their current tour.

Taylor Swift joined Mick Jagger to perform the band's classic ballad "As Tears Go By", one of the very first songs written by Mick and Keith Richards.

I guess it's safe to say that Taylor was thrilled. Later that evening she tweeted a picture of her and Mick with this; "Filing this under 'never in my wildest dreams.' Thank you Rolling Stones for inviting me to Chicago to sing with you."

See the performance below.