<P> Hugh McIntyre of Forbes found the song "surprisingly slick, especially for a band that has pushed a narrative of being rowdy rock boys", and he noticed the song of being "more mature". Rania Aniftos of Billboard deemed it an "apologetic pop track" and a "synth - y upbeat tune". Althea Legaspi of Rolling Stone regarded it as a "pop - flavored track reflects on a lost love and captures the yearning that often follows a breakup". Madeline Roth of MTV News stated that the song "marks a huge departure from the band's raucous pop - punk roots". She found the band "opting for a slick, more polished pop sound on the new tune, which finds them reminiscing about an ex and wondering what went wrong". Mike Wass of Idolator wrote that the band have abandoned "the pop / punk of their first two albums and dive head - first into slick, radio - friendly pop with a rhythmic edge". Nicole Mastrogiannis of iHeartRadio also opined that it "takes a step back from 5SOS's signature pop / punk vibes" and "playing up the guys' pop side a bit more". </P> <P> Credits adapted from Tidal . </P> <P> 5 Seconds of Summer </P> <Ul> <Li> Calum Hood--composition, vocals, bass guitar </Li> <Li> Ashton Irwin--compositions, vocals </Li> <Li> Luke Hemmings--compositions, vocals, rhythm guitar </Li> <Li> Michael Clifford--lead guitar, vocals </Li> </Ul>

Who sings what part in want you back 5sos