The popstar will hold a one-off performance for shoppers at a mystery outdoor Central London location. It is the first time the celebrity has teamed up with Coca-Cola.
Andre will sing his current single, 'Unconditional', as well as a selection of festive songs. The event will help to raise funds and awareness for 95.8 Capital FM's, Help a London Child, which helps London's less advantaged and most vulnerable children and young people.
Andre commented: "I love Christmas and everything associated with it so I jumped at the chance to help bring a little extra festive cheer to shoppers. I can't wait to sing some of the nation's favourite and best known Christmas songs and really start feeling Christmassy!"
Coca-Cola's sponsorship of the 35 pitches begins on 30 November. It supports its TV activity which rolled out 14 November.