One Direction, Leona Lewis, Coldplay and Adele to perform on 2015 X Factor Final

2015 X Factor contestants Reggie N Bollie, Che Chesterman and Louisa Johnson. Taken Saturday Dec 5th at Fountain Studios, London. Picture by: Syco / Thames / Corbis
Adele will perform on Sunday night’s (Dec 13) X Factor final, The Sun reports.
She is expected to perform “Hello” from her ground-breaking album, 25. This will be her second UK Television appearance, following her BBC One special hosted by Graham Norton last month.
Even though there’s been no announcement of her performance, a tweet from The X Factor account did drop a big hint.
Hello.
— The X Factor (@TheXFactor) December 10, 2015
The Sunday night finale will also feature other music guests, including One Direction, Leona Lewis and Coldplay, as well as last year’s winner Ben Haenow, Fluer East and Little Mix.
This year’s X Factor final will see Ghana’s Reggie ‘N’ Bollie, Che Chesterman and Louisa Johnson compete for a recording contract with Simon Cowell’s label, Syco.