Megan Fox's Tips for Kourtney Kardashian on Being the Best 'Tour Wife' For Travis Barker

Kourtney Kardashian will be ready when Machine Gun Kelly (born Colson Baker, 32)

resumes his Mainstream Sellout tour in September. Travis Barker, Kourtney's husband,

joined MGK on three dates of the North American leg of the tour, and Kourtney, 43, was his proud "tour wife."

It's been a chance for the Kardashians alum to get a glimpse into Travis's world and live a different kind of life - and she got a crash course on it from Megan Fox.

"Megan has tagged along with Colson on numerous performances before,"

a KarJenner source tells HollywoodLife EXCLUSIVELY, "so although she's not with them at the moment." “