If You Don't Know - 5 Seconds of Summer Share: Download MP3 More song by 5 Seconds of Summer View all Youngblood 5 Seconds of Summer 01:07 Teeth 5 Seconds of Summer 01:07 She Looks So Perfect 5 Seconds of Summer 01:07 Who Do You Love 5 Seconds of Summer 01:07 Ghost of You 5 Seconds of Summer 01:07 Amnesia 5 Seconds of Summer 01:07 COMPLETE MESS 5 Seconds of Summer 01:07 Easier 5 Seconds of Summer 01:07 She's Kinda Hot 5 Seconds of Summer 01:07 Old Me 5 Seconds of Summer 01:07 Similar Artists Luke Hemmings Ashton Irwin One Direction Niall Horan Harry Styles Shawn Mendes The Vamps ZAYN All Time Low Little Mix
