The Everly Brothers have it.
The Brothers Four don't.The Lennon Sisters do, but not The Saliva Sisters.
We hear a lot more about sibling rivalry than sibling harmony these days, though one is just as real as the other.
Sibling harmony is a musical term that refers to the tight -- almost inseparable -- vocal harmonies generated by members of the same family. EMILY AND FIONA most definitely have it !










