Luke:

Under The Bridge - Red Hot Chili Peppers
First Heartbreak - Tori Kelly
Crown Of Love - Arcade Fire
How Soon Is Now? - The Smiths

Ashton:

Don't Cry - Guns N' Roses
What It Takes - Aerosmith
Black - Pearl Jam
Skinny Love - Bon Iver

Calum:

You Should Be Here - Kehlani
Dreaming With A Broken Heart - John Mayer
Fix You - Coldplay
Say Goodbye - Chris Brown

Michael:

Tangerine - Led Zeppelin
Breakeven - The Script
Whatever It Takes - Lifehouse
Not Over You - Gavin DeGraw