Smoke on the Water by Deep Purple

It is said this song was inspired by a fire in the Montreux Casino on 4th December 1971, where the band were about to record their album Machine Head (which has this track on).

54-46 That's my number by Frederick Nathaniel Hibbert

"Toots" Hibbert who wrote this song for his band The Maytals, was born on 8th December 1942.

Symphony No 5 by Beethoven

Beethoven was born on 17th December, 1770. The opening of his 5th symphony is one of his most recognisable motifs.

Happy by Pharrell Williams

There are lots of dates attached to this song, but December was the month it really climbed through the European charts, hitting no 1 in the UK on 29th December. It was used along with some other Pharrell songs in the film Despicable Me 2 (released 3rd July 2013), and was first released as a single on 21st November 2013.