Robbie Williams will turn on the Christmas lights later this evening at Oxford Street in London.
The 38-year-old from Stoke-on-Trent will be joined by Leona Lewis and Lawson.
Tens of thousands are expected to attend the event, which will be ticketed for the first time.
More top news
An engineer has been confirmed dead in the crash in Wales. The RAF say the pilot survived and is receiving treatment.
A Red Arrows jet has crashed after an incident at RAF Valley in north Wales, the Ministry of Defence has said.
It has been confirmed that the Red Arrows pilot survived the crash but unfortunately, the passenger, an RAF engineer, died.