The former Boyzone star wed his Australian fiancee Storm Uechtritz in Scotland, and Sheeran helped the couple celebrate their big day by serenading them during the party.

Sheeran was later joined on stage by Keating and his bandmates Mikey Graham, Shane Lynch and Keith Duffy, and fellow Irish singer Brian MCFadden for a group performance.

In a post on Twitter.com on Tuesday (18Aug15), MCFadden wrote, "Last night had the best jam ever. @BrianMCFadden @edsheeran @ronanofficial @officialkeith Mikey Graham and @shanelynchlife madness (sic)", before uploading a 'selfie' picture with Sheeran.

The Thinking Out Loud hitmaker has become a regular at romantic occasions in recent weeks - last month (Jul15), he serenaded Little Mix star Jesy Nelson as she accepted a proposal from Rixton singer Jake Roche, and he helped his friend from band Kodaline pop the question to his girlfriend at a show in Ireland.