Song for a girl band to play for an event? Details given. Please help? :'(?

Okay. So there's this BIG inter-school fest that's coming up in two
weeks. And we need to perform three songs.

1. A 'Simon and Garfunkel' number
2. A solo
3. A group song

Rock is absolutely NOT allowed. The genres we can play are Pop and
Country.

Can someone PLEASE suggest me some songs that we can pull of? We have
amazing instrumentalists and decent vocalists. Can someone PLEASE
help? :'( I thought asking the rest of the world would be a good
idea.... help? Please please pleeeeeeeeeeease?