It's Dublin in 1994, and the Doctor and Donna have arraived at the tiny nightclub known as Headlong. Headlong is famous for precisely one thing - holding the karaoke night where four young women came together to make the biggest girl band of the 90s: the Honeybloods. Donna has convinced the Doctor to visit their first ever concert (she reckons she could have been one of them if the timelines were different) - and he has begrudgingly...