Boyzone are an Irish boy band. Its most famous line-up was composed of Keith Duffy, Stephen Gately, Mikey Graham, Ronan Keating, and Shane Lynch. Boyzone have had 19 singles in the top 40 UK charts and 21 singles in the Irish charts. The group have had 6 UK number one singles and 9 number one singles in Ireland with 12 of their 20 singles in the UK being in the UK Top 2. Boyzone are one of the most successful bands in Ireland and the United Kingdom. In total, Boyzone had 19 top 5 singles on the Irish Singles Chart, 18 top 10 hits on the UK Singles Chart, nine #1 Irish hit singles and six #1 UK hit singles and five #1 albums, with 25 million records sold by 2013 worldwide. The number is confirmed by Gately's book The Tree of Seasons.