Calum Hood is an Australian musician and songwriter, best known as the bassist and a vocalist of the pop rock band 5 Seconds of Summer. Born on January 25, 1996, in Mount Druitt, New South Wales, Australia, Hood grew up with a passion for music and sports. He initially pursued soccer at a competitive level but eventually chose to follow a musical career. In 2011, he co-founded 5 Seconds of Summer along with Luke Hemmings, Michael Clifford, and Ashton Irwin. The band gained popularity by posting cover songs on YouTube before being discovered and invited to tour with One Direction. Their breakthrough came with the release of their debut single "She Looks So Perfect" in 2014, which topped the charts in several countries. As part of 5 Seconds of Summer, Hood has contributed to the band’s success with his strong musicianship and songwriting skills. The group has released multiple chart-topping albums and has cultivated a global fanbase. Calum Hood is recognized for his distinctive bass playing, emotional lyrics, and quiet charisma, playing a vital role in shaping the band’s evolving sound over the years.