Luke Robert Hemmings is a 24 year old Australian (born on 16 July 1996) from the band 5 Seconds Of Summer. He plays guitar, piano and sings. He's by the way the lead singer in the band. He started by posting phenomenal covers of songs on his YouTube channel, hemmo1996 in 2010. Later, Calum Hood and Michael Clifford joined him. In 2011, Ashton Irwin joined Luke to form 5 Seconds Of Summer.