The Christmas lights will be up nine weeks

The X Factor winner, who has gone to number one in the charts this week, will switch on the central London illuminations on 7 November.

Westlife and the West End cast of Mary Poppins are also set to perform at the switching on ceremony.

All the lights are using LED bulbs, which use 75% less energy than conventional bulbs.

Jace Tyrell, from the organisers The New West End Company, said: "For nine weeks the dazzling canopy of chandeliers will stretch suspended above the heads of shoppers as they zip in and out of the 300 shops lining Oxford Street."