Well I never knew that !

[Dave Wells]

Crap performance that didn't make any of the released formats or shown anywhere to my knowledge. But were they excused from the picture taking (video/dvd/album cover shot) session or not present ?

[Jonone]

Apparently Bowie's contributed some backing vocals to Scarlett Johansen's album of Tom Waits covers. Part of Dave's strategy to be seen to be relevant which includes being seen at Arcade Fire gigs etc.