Kate Moss and Sienna Miller to sing duet?

Kate Moss and Sienna Miller are reportedly set to perform a duet together this weekend.

The supermodel and the actress -- who came to blows when Sienna started dated Kate's pal Rhys Ifans last year -- are set to sing together at an Agent Provocateur lingerie event in Vienna, Austria.

Moss, who used to sing with ex-boyfriend Pete Doherty alongside his band Babyshambles, will also be joined by former The Clash guitarist Mick Jones as they perform.

A source said: "Sienna and Kate have been practicing non stop to get ready for this gig and they have obviously been paid an absolute fortune to attend."