Kourtney Kardashian has supported Travis Barker at a gig from backstage

Alongside a slideshow of images showing the newlyweds being affectionate backstage, she wrote: "tour wife." (sic)

'The Kardashians' star then shared a follow up image of herself learning to play the drums in an attempt to be like her husband.

She captioned the photo: "time for drum practice."

The 'Feeling This' rocker - who was previously married to 'Celebrity Big Brother' star Shanna Moakler and has Landon, 18, and Alabama, 16 with her - was quick to share his photos in a similar post onto his own feed and commented: "Favorite time of the day [black heart emoji.]"

Kourtney responded: "Practice makes perfect" (sic) and Travis replied once more: "When you can't see and you're still the most [fire emoji]"

The 'Bloody Valentine' hitmaker then teased fans with a setlist item from the show.

He wrote: "Put a middle finger up if you'll be playing LOVE RACE with us tonight" (sic)

Just moments prior to the surprise appearance, MGK told the crowd: "There's a person I grew up idolizing that I became friends with and he believed in me. And never more have I wanted to jam to a song that he and I created. LA's own, Travis Barker! Make some noise for him tonight."