To be honest, we were wondering why they arrived together, earnestly hand-in-hand, to the MET Gala earlier this month... And now we know why. 

The designer has asked the singer to star in his Fall ad campaign, and this is among the resulting photographs...

Not sure why I'm surprised, she's a good fit for the brand, she looks striking as f***, and it has echoes of her Oscar offering from many moons ago.

It's just that her fashion choices, albeit mainly her onstage fashion choices, aren't exactly in the same realm as previous Jacobs' muses such as Victoria Beckham and Karlie Kloss. Just saying.