Young Holidays’ glitzy new track, “Jackie Kennedy”, continues the 23-year-old songwriter’s knack for jubilant hooks. This track is a pulsating synth-pop anthem that transitions from club-ready verses to rock-inspired choruses, the superb one on “Jackie Kennedy” being led by a howling electric guitar. It’s impossible to tell where the track is headed initially, with a halted synthesizer as the sole lead. But very quickly the delicately twinkling additives prep listeners for the oncoming chorus, shifting abruptly from bedroom-made synth song to a polished dance-pop punch. This is Young Holidays’ most refined effort to date, and it shows the songwriter heading in a direction that will surely result in radio play.