Joe and Harpz in a BAKING CHALLENGE!
Joe and Harpz love surprising Mash-Up viewers so we thought they deserved a surprise of their own!We brought in Bake-Off winner David to challenge Joe and Harpz to a cake decorating contest.
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Tell us what you thought of Saturday Mash-Up below and don't forget you can get involved in the show by sending in your drawings, making a dream come true or by showing us your lockdown haircut.