Answer:

are

Answer	Crossword Clue
ARE	"Butterflies .. Free"
ARE	"Chances ..."
ARE	"Roses ... red..."

ARE	"We .. the World"
ARE	"Where The Boys ..."
ARE	"You .." (Richie tune)
ARE	".. we having fun yet?"
ARE	".. you serious?"
ARE	".... we having fun yet?"
ARE	".... you nuts?"
ARE	Is doubled?

ARE	Is plural?
ARE	Last word of Shelley's "Adonais"
ARE	Subsist
ARE	"All the Things You ..."
ARE	"Chances .."
ARE	"Violets .. blue..."
ARE	"You ... There"
ARE	".. you nuts?"

ARE	"... You Lonesome Tonight?"
ARE	".... you positive?"
ARE	A backward ERA?
ARE	Breathe
ARE	Exist
ARE	"Is" doubled?
ARE	"Stay As You ..." (1978)
ARE	"You ... here"

ARE	"... you for real?"
ARE	"... you ready?"
ARE	A verb for you
ARE	Exist (en masse)
ARE	Is plural
ARE	... you kidding me?
ARE	"... you kidding me?"
ARE	Beatitude's second word

ARE	Exist en masse
ARE	You ... here
ARE	Beatitudes verb
ARE	"My lips ... sealed"
ARE	"... you nuts?"