Exactly What It Says on the Tin. This is a type of musical number which, naturally, has a small beginning and a big ending. These are usually done by one character in a solo, a solo verse in a duet continuing on to the end, or sometimes the lead part in an ensemble number. It may occur in a musical or just an atmosphere where there's music. Usually done with celebrities or just people who are famous for their singing, since anyone who knows them knows they can sing; they're just waiting for that one money-making note. It can usually occur in one of four forms: