Merging pop-punk energy and ebullient boy band charisma, Australia's 5 Seconds of Summer burst onto the international music scene in the early 2010s, attracting fans with anthemic, hook-oriented songs that helped their self-titled 2014 debut land at number one on the pop charts. While follow-up album Sounds Good Feels Good retained their guitar-based sound -- scoring the group their second Australian and U.S. chart-topper -- they underwent a major pop reinvention in 2018 with their third number one, YOUNGBLOOD, which debuted a refined electronic dance-pop vibe. The group has c...