Madonna enjoyed dinner with her friend Stella McCartney last night in London, and the two were giggling as they left the restaurant Locanda Locatelli. We may be seeing Madonna on the next series of The X Factor as she's apparently one of a few artists being approached to perform and mentor in this year's show — how exciting! Robbie Williams, Lady GaGa, Rihanna and a return by Beyonce are also apparently on Simon Cowell's wish list. Would you like to see Madonna on The X Factor? Let me know!