The teen singers must create their own popstar image, helped by fashion stylist to the stars, Sabrina Grant. Will they manage to strut their stuff on the catwalk in front of a big shopping centre crowd? The mums brush up on their art skills, with added pressure when they find out who they're painting! Not everyone is left happy with the bigger picture.

British boyband Union J pop by the Music Mansion with a harmony challenge for the kids: will they manage to be beautifully in tune or an awful racket? The mums face rough tides when pulled behind a speedboat on a giant inflatable - who will manage to stay afloat the longest? With only three Sing-Off's left, the competition is hotting up - can anyone win a second Sing-Off to take the lead?

In the most difficult challenge yet, emotions are running high as the kids must compete in front of music producer, DJ and rapper, Ironik. Something's a bit fishy as the mums become mermaids for the day. Who will win the penultimate end-of-show Sing-Off?