There have been 1383 UK chart single number 1s since 1952.
This song is about a boyfriend who neglects his girl and takes her for granted. One day, he wakes up and she's gone. It's only in her absence that he realizes what she means to him and comes to appreciate her. This is a reworking of the 1964 Bobby Vinton hit "Mr. Lonely." The sample was sped-up so it sounded similar to The Chipmunks.
More songs from the same decade.