Mike Posner leapfrogs Lukas Graham to grab No. 1

Having risen inexorably over weeks and weeks, Mike Posner's 'I Took A Pill In Ibiza' can climb no more, having finally reached No. 1 in the Irish singles chart.
The American knocks Lukas Graham from the top spot, where his '7 Years' had happily sat for more than a month. That particular earwig is still good for second position, ahead of Sia, Zara Larsson and Jonas Blue, all of whom hold their positions from last week.
Fifth Harmony - with help from Ty Dolla Sign, climb five places with 'Work From Home', but otherwise change is at a minimum; Alan Walker, Major Lazer, Twenty One Pilots and Rihanna all keep spots within the top ten.