What songs are good to sing for a 9 year old girl duo?

* "Best Friends" by Taylor Swift (from the My Little Pony: Equestria Girls - Rainbow Rocks movie)

* "Count on Me" by Bruno Mars

* "A Friend Like Me" by Robin Williams (from Disney's Aladdin)

* "True Friend" by Hanson

* "Best Friends Forever" by Lennon & Maisy

* "Let It Go" by Idina Menzel (from Disney's Frozen)

* "Shake It Off" by Taylor Swift

* "Confident" by Demi Lovato

* "Roar" by Katy Perry

* "Girl on Fire" by Alicia Keys