The Fashion designer decided to team up with the '212' singer and rapper on his latest jersey clothes line, T.
In a video for the campaign the 21-year-old wears pieces from the Autumn/Winter 2012 collection as she struts along singing 'Van Vogue' from her latest EP '1991.'
The singer accompanied Alexander to the Met Ball earlier this year sparking rumours that they were going to collaborate on a collection.
Speaking about the partnership Alexander told style.com: ''She exudes a certain rawness that makes her a very unique talent ... I loved working with her on this video for T Fall 2012, and think the collaboration captures a Collision of energies.''
The feisty singer has previously collaborated with Lady GaGa's stylist, Nicola Formichetti, on her video for single ''Liquorice'' and she performed at the Mugler fashion show in Paris.