Real Names: Luke Hemmings, Michael Clifford, Calum Hood and Ashton Irwin
Born: 16 July 1996 (Luke), 20 November 1995 (Michael), 25 January 1996 (Calum) and 7 July 1994 (Ashton)
Height: 6' 3" / 1.93 m (Luke), 6' 1" / 1.92 m (Michael), 6' 0" / 1.83 m (Calum) and 6' 0" / 1.83 m (Ashton)
Star Sign: Cancer (Luke), Scorpio (Michael), Aquarius (Calum) and Cancer (Ashton)
The Australian rock band, commonly referred to as '5SOS', originated on YouTube, posting videos of themselves covering famous hits during 2011 and 2012. They soon rose to fame, however, when the toured and opened for One Direction, during their 'Take Me Home Tour'. They then saw huge success after the release of 'She Looks So Perfect'.
Did you know?
Compared to the other boys, Luke gets the most nervous right before going on stage.
Michael once serenaded a girl by singing 'One Less Lonely Girl' to her.
Calum's favourite singer was Chris Brown when he was younger.
As well as the drums, Ashton can play the saxophone, piano and guitar.
First Single: 'Out of My Limit'
5 Seconds Of Summer Discography: '5 Seconds of Summer' (2014) and 'Sounds Good Feels Good' (2015)