Arden visited Bublé backstage at the Saddledome before his concert in Calgary on Tuesday.
In a video posted to his Instagram account, the pair can be seen singing along to “I’m Yours” by Jason Mraz during a dressing room warm-up.
WATCH: Michael Bublé sings “I’m Yours” by Jason Mraz with Jann Arden
It’s not the first time Bublé has been visited by a special guest before a Canadian concert date.
On Sunday, he posted a video of himself performing the Elvis Presley classic “Love Me Tender” with country star Hunter Hayes backstage at Rexall Place.
WATCH: Michael Bublé sings “Love Me Tender” with Hunter Hayes
Bublé performed in Calgary on Monday and Tuesday, and appears to have done quite a bit of sightseeing while in town.
On Tuesday, he posted a picture of himself with a well-known landmark in the city’s downtown core; a statue by William McElcheran titled “The Conversation” located along Stephen Avenue Walk.
BELOW: Michael Bublé poses with an iconic Calgary statue