Sammy's Band

Sammy has been discussing the possible line-up of his band the past couple of days. So far, this is what he's figured out:

Sammy on drums and cymbals
Cal on guitar
Hannah on bass
Kennedy on the microphone (I guess this means singing?)
Andrew on piano
and Phoebe singing

Sometimes Sammy is on drums, bass and piano but I imagine that becomes exhausting - that's where his friends come in.