Rec Music

I'm in the process of finding songs for our competition music. I have a ton of songs I like. My problem is figuring out which ones will go together. We only need 5-6 songs. I want something kinda different (which is why applause and roar aren't on the list) but not too far out there. The girls range in age from 7-11 and I want them to enjoy the music too. Any ideas???
Songs I'm considering so far:
Sure Fire Winners by Adam Lambert
Obsession by Sky Ferreira
Invincible by Secret Sebastion
Now by Paramore
My Songs Know What U did in the Dark by Fallout Boy
Come and Get It by Krewella
Run this Town by Lucy Hale
Radioactive by Imagine Dragons
Live for the Night by Krewella
Make You Belive by Lucy Hale
Burn by Ellie Goulding
Glowing by Nikki Williams
and my assistant really wants I Love It by Icona Pop or Beautiful by Mariah Carey

I also need help with voiceovers and a good team name! We previously went by the Southside Celtics since the majority of our girls were from the same school but we have alot of girls from other areas this year so I'd like to find something else to go with Celtics (using same uniform). Our colors are Green, Black, and White. We don't have a mascot. Our theme in our cheer portion is Watch Out We're Back. Any ideas on names, voiceovers, and music is much appreciated! Thanks!