Reaching the top of the charts is a sign of being at the top of your game. To do it on multiple occasions? That's a mark of legitimacy, hard work and sheer talent.
In the last 20 years, just 26 acts have managed to claim four or more Number 1s on the Official Irish Albums Chart. But who has topped the charts the most?
Irish music royalty doesn't get much more decorated than Westlife, who have scored more Number 1 albums since 2000 than any other act.
11 of Westlife's 13 official studio albums and greatest hits have hit Number 1, with 20 years between the first and most recent.
Read more on officialcharts.com