Pharrell Williams' track Happy has become the first number one single of 2014 in Ireland.
X Factor winner Sam Bailey has moved down the list to number five following her Christmas number one success.
This week's Top 10 singles are as follows:
1. Pharrell Williams – Happy
2. Avicii – Hey Brother
3. Pitbull ft. Ke$ha – Timber
4. Lily Allen – Somewhere Only We Know
5. Sam Bailey – Skyscraper
6. Eminem ft. Rihanna – The Monster
7. Jason Derulo – Trumpets
8. Katy Perry – Roar
9. Hozier – Take Me To Church
10. One Direction – Story of My Life
