Help!! Name for a trio of female singers asap!!?

I'm in a production of grease and a part has been added to the show and its like three backup singers or 'radio girls' who work with the main radio presenter 'vince fontain' and sing with the band during the big school dance. We need a name for our trio that would work in the 50s style ...kinda like the something ets maybe...? anyway we cant think of anything so any suggestions would be awesome!!! thanks! x