5 Seconds of Summer, often known as 5SOS, are an Australian pop rock band formed in Sydney in 2011. The group features lead vocalist and rhythm guitarist Luke Hemmings, lead guitarist Michael Clifford, bassist Calum Hood, and drummer Ashton Irwin. Starting out by posting covers on YouTube, the band gained widespread recognition after touring with One Direction in 2013. They achieved their breakthrough with the single "She Looks So Perfect" in 2014, which led to their debut album topping charts in multiple countries. Since then, 5 Seconds of Summer have released several successful albums, including Sounds Good Feels Good in 2015, Youngblood in 2018, and Calm in 2020, each debuting at number one in Australia and charting highly worldwide. The band made history as the first Australian act to have their first three albums debut at number one on the US Billboard 200 and are among the country’s most successful music acts, with over 10 million albums sold, more than 7 billion streams, and 2 million concert tickets sold globally. 5 Seconds of Summer are known for hit singles like "Youngblood," which became one of the highest-selling Australian singles of its decade. The band has received numerous awards, including the APRA Outstanding International Achievement Award and a place on Billboard's Top Artists of the 2010s. As of 2020, their estimated net worth is over 80 million US dollars.