Madonna and Justin Timberlake performing at a thank you show for fans to celebrate the release of 'Hard Candy' at the Roseland Ballroom. New York City, USA - 30.04.08

The singer will serve as an executive producer on a game show called The Phone which is due to air this autumn (08).

The programme will feature contestants following instructions on a cellphone and completing a mission to win a cash prize, with MTV comparing the format to a weekly "action-packed mini movie".

Source: WENN