The B-side to the CD version, "Model Behaviour" has been performed by Nash at recent concerts.

Merry Happy also appeared in one scene of I Really Hate My Job as background music.

The song was also used in season 1, episode 14 of the NBC TV series Community, "Interpretive Dance".

All songs written by Kate Nash Each copy of "Merry Happy" had a number from 1–1000 printed on it.

A competition was held on the official Kate Nash website, where fans who bought a copy of 'Merry Happy' with a winning number on it would win the chance for Kate Nash to customize their copy for them.