Why are we doing this and how can you participate? To take part in the CBBC Saturday Mash-up! Competition, you must be 15 and under to enter. For a chance to win a selection of Saturday Mash-up!

We want to hear from you if you: Watch Saturday Mash-Up with anything weird and wonderful. Maybe you watch with your pet goat or your collection of cuddly toys. Whatever or Whoever it is ...