Recording artist and popular stage performer Sam won the TV talent show in 2013 and will be pressing the on-switch as well as peforming five well-known songs.
She will be the headline act in an afternoon of stage entertainment, which includes Beyonce tribute act Victoria, Banbury Rock Choir, local band The Next Hot Thing and Gary Barlow tribute act, Mitch, and will meet and greet fans, sign autographs and pose for photographs.
The show begins at 2pm, and there are no admission charges.
Sam is due on stage at 4.20pm and the lights will be switched on at 5pm. Hatwell’s Funfair will provide rides and sideshows in the Market Place, and Father Christmas will be nearby on his sleigh – courtesy of Banbury Cross Round Table.
There will be refreshment stalls and Fantazia Fireworks will bring the event to a close.