Hmm maybe this helps? Those particular words show up in a few songs so maybe one of these is it?
Boys And Girls - Pixie Lott
Pixie Lott - Boys And Girls - YouTube
Gossip Girl Girls: All the boys and all the girls
Gossip Girl Girls: All the boys and all the girls are begging to... - YouTube
Great DJ by the Ting Tings
The Ting Tings - Great DJ - YouTube
Funny how that very specific line can show up in so many songs isnt it LOL!!!
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These songs also contain those lines but you said it was a girl right?
Bring Em Out by Hawk Nelson
Hawk Nelson - Bring Em Out - YouTube
Charlie Brown by Coldplay
Coldplay - Charlie Brown - YouTube