With it being Christmas week, why not test yourself with our Irish Christmas Number Ones quiz?
If you've been listening to Christmas FM since November and still have the Christmas compilations knocking about on tape and CD, you could be onto a winner.
This will separate the Bing Crosby's from the Linda Martin's. The Ronettes from the Dustin the Turkey's. The WHAM!'s from the Joel Corry's.
See how you get on.