I'm pretty sure this is the correct song choices:
Rundown:
Alex & Sierra--Blurred Lines (Robin Thicke, Pharrell Williams, TI)
Carlito Olivero--Maria Maria (Santana)
Carlos Guevara--Don't You Worry Child (Swedish House Mafia)
Danie Geimer--Wrecking Ball (Miley Cyrus)
Ellona Santiago--Till The World Ends (Britney Spears)
James Kenney--Red (Daniel Merriweather)
Jeff Gutt--Try (P!nk)
Josh Levi--Only Girl In The World (Rihanna)
Khaya Cohen--Mercy (Duffy)
Lillie McCloud--When A Man Loves A Woman (Percy Sledge)
Rachel Potter--I Hope You Dance (Lee Ann Womack)
Restless Road--Roar (Katy Perry)
Rion Paige--Skyscraper (Demi Lovato)
RoXxy Montana--Royals (Lorde)
Sweet Suspense--I Love It (Icona Pop)
Tim Olstad--Always (Bon Jovi)
Not in spoiler since they tweeted what they are performing. Mostly current songs

but some of the choices
Still better than see them perform dinasour songs like last year.