Factor boy band Union J become dinner ladies at a primary school, Rachel Riley coaches a girls football team, and TV presenter Joe Swash takes on the role of dog groomer. Also Musical theatre star Michael Ball sings to an audience of cows, and Made in Chelsea's Jamie Laing helps an applicant get over her fear of shark-diving - while trying to overcome his. The celebrities have all been booked for these bespoke services by viewers as part of the Stand Up to Cancer fundraising campaign