Father and son Shash and Saaj from Crawley try to use their detective skills to tell the good singers from the bad and win £10,000. With a line-up including a singing boxer, an actor and a doctor, they may have their work cut out. Once they have eliminated the singers they think must be imposters, the last singer standing wil perform a duet with this week's guest star, Ronan Keating. Will it be a a magical musical moment or a comedy collaboration? Being expert Bollywood dancers, Shash and Saaj also teach the panelists how to bust a move.