The Irish Singles Chart ranks the best-performing singles in Ireland, as compiled by the Official Charts Company on behalf of the Irish Recorded Music Association.
Issue date Song Artist(s) Reference 6 January "Rockabye" Clean Bandit featuring Sean Paul and Anne-Marie 13 January "Shape of You" Ed Sheeran 20 January 27 January 3 February 10 February 17 February 24 February 3 March 10 March "Galway Girl" 17 March 24 March "Shape of You" 31 March 7 April 14 April 21 April 28 April 5 May "Despacito" Luis Fonsi and Daddy Yankee featuring Justin Bieber 12 May 19 May 26 May 2 June 9 June 16 June 23 June 30 June 7 July 14 July 21 July 28 July 4 August 11 August 18 August "New Rules" Dua Lipa 25 August 1 September "Look What You Made Me Do" Taylor Swift 8 September "New Rules" Dua Lipa 15 September 22 September 29 September 6 October 13 October 20 October "Rockstar" Post Malone featuring 21 Savage 27 October 3 November "Havana" Camila Cabello featuring Young Thug 10 November 17 November 24 November 1 December 8 December "Perfect" Ed Sheeran 15 December 22 December 29 December
Number-one artists Position Artist Weeks at No. 1 1 Ed Sheeran 20 2 Luis Fonsi 15 Daddy Yankee Justin Bieber 5 Dua Lipa 8 6 Camila Cabello 5 Young Thug 8 Post Malone 2 21 Savage 10 Clean Bandit 1 Sean Paul Anne-Marie Taylor Swift
References