Which member of Boyzone died in 2009 during a vacation in Spain?

Explanation

Boyzone was an Irish vocal pop group, formed in 1993. The group consisted of Ronan Keating, Mikey Graham, Keith Duffy, Shane Lynch and Stephen Gately. The group's first album, "Said and Done" was released in 1995. A great number of the group's hits are covers, e.g. "Baby Can I Hold You" and "Words". The group dissolved in 1999 og reformed in 2007. Stephen Gately died in 2009 of natural causes during a vacation in Spain.