I HIGHLY doubt that, Madonna would be very foolish to work with her. Her stans WON'T be happy. And considering her age, people will just look at it as Madonna needing to depend on the younger pop stars to help make a "comeback" --- they did it when she worked with Britney, Justin & Lil'Wayne.
I've grown to like Madonna, I will lose a lot of respect for her if this is true, nor will I take her serious anymore.