Cobain delivered one of the best features on Bieber’s latest album, released on July 11, the highest-profile moment in the rapper’s career so far, with Cobain taking the opening verse on Swag’s title track.

It’s not known how many tracks the pair produced together, but one of them - Daises - has appeared on Bieber’s surprise new album, Swag. A slice of smooth alt-pop/R&B, this is powered by Mk.gee’s instantly recognisable guitar playing, but perhaps isn’t as “wild” as some might have hoped for.