A look back at the first 21 years of Britain's most successful film series.

Compilation of some indelible hits by artists we hardly heard from again, at least in a chart sense. Featuring Peter Sarstedt's Where Do You Go To (My Lovely)? - a number one in 1969 and a hit he never really matched, Trio's 1982 smash Da Da Da, Phyllis Nelson's 1985 lovers rock-style classic Move Closer, and The New Radicals' 1999 hit You Get What You Give. We travel through the years selecting some of your favourite number ones and a few others that came close, revealing what's happened to the one-off hitmakers since and exploring the unwritten laws that help make sense of the one-hit wonder phenomenon.