Jamie Oliver and Jimmy Doherty kick start the New Year celebrations with a special edition of Friday Night Feast. And, as we all require a treat at the end of this year, they're joined by not one however TWO celebrity guests to get the celebration going … Singer-songwriter Sam Smith and PE-teacher-to-the-nation Joe Wicks sign up with Jamie and Jimmy to assist prepare a series of tasty meals, best to get us in the state of mind…