The other character challenge entry (you could choose 3 fictional characters and create a mashup about them - you had to select the character beforehand) DJNoNo chose Doctor Who cos he wanted to work with Mankind's Disco Who track. Adding Gloria Estefan, John Pertwee and the opening song from Craig Ferguson, it answers the question 'Who is the Doctor?'.

Gloria Estefan - Doctor Beat
Mankind - Doctor Who
Jon Pertwee - Who Is The Doctor
Craig Ferguson - Doctor Who intro song