The newest guest to join Taylor Swift on stage during her concert was none other than country singer and "American Idol" judge Keith Urban, who performed a series of songs with the "Shake It Off" singer at the Toronto Rogers Center on Friday night.

"Someone absolutely incredible is about to come out on this stage," she told the crowd, according to Rolling Stone. "This is someone who has sold 20 million records. This is someone who, more importantly, is an amazing human being. I actually opened up for his tour years ago. He's been so wonderful to me. He's one of the most talented people who's ever been born. Toronto, Keith Urban is here to see you."

Urban strapped on a guitar and performed a rendition of his latest hit "John Cougar, John Deere, John 3:16," with Swift. The pair also sang his other chart-topper, "Somebody Like You," together, according to Billboard.

"Tonight @KeithUrban played "John Cougar, John Deere, John 3:16″ in Toronto with us!!" Swift tweeted.

"Grease is the word!!! Hey ‪@taylorswift13 - u killed it last nite - thank u for the invite - ridiculous fun!!!!!! - KU," Urban wrote on Twitter.

Swift has invited number of A-Listers on stage during her "1989 World Tour" including Julia Roberts, Avril Lavigne, Selena Gomez, Mick Jagger and Steven Tyler.

Watch Taylor Swift and Keith Urban's performance below:

@ 2024 HNGN, All rights reserved. Do not reproduce without permission.