this version of Glory - John Legend could work including rap

Lauren - The Way We Were (Barba Streisand) or Flashlight (Jessie J)

Louisa - Don't You Forget About Me (Simple Minds)

4th Impact - Let It Go (Idina Menzel)

Che - Elastic Heart (SIA)

Mason - uninterested

Max - Hold On (Wilson Phillips)

Anton - Kiss (Prince)

Monica - Together Again (Janet Jackson)

Reggie and Bollie - Happy (Pharrell WIlliams)

My suggestions...

Louisa - I'm Not A Girl (Not Yet A Woman) (Britney)
Lauren - Can't Fight The Moonlight (Leanne Rimes)
Monica - Love Me Like You Do (Ellie Goulding)
Max - Can't Help Falling In Love (UB40) or even a reprise of Gangsta's Paradise from JH.
Anton - Listen (Beyonce) (someone has to)
Reggie and Bollie - Under The Sea
4th Impact - You're Never Fully Dressed Without A Smile (Sia version from Annie)
Che - Earned It (The Weeknd)
Mason - Persuit of Happiness (Kid Cudi ft. MGMT)

Louisa - Elastic Heart (Sia) [Hunger Games]
Lauren - Be My Baby (The Ronettes) [Dirty Dancing]
Monica - Paper Planes (M.I.A.) [Slumdog Millionaire]

Anton - I See You (Leona Lewis) [Avatar]
Max - Gangsta's Paradise (Coolio) [Dangerous Minds]

4th Impact - Lady Marmalade (Christina Aguilera, Pink, Mya & Lil Kim) [Moulin Rouge]
Reggie N Bollie - I Like To Move It (Real 2 Real) [Madagascar]

Che - Pure Shores (All Saints) [The Beach]
Mason - Check On It (Beyonce) [The Pink Panther]