Happybirthday

6 clues
Party line
__ to you?
Annual refrain
Annual greeting
July 4th message to America
Song sung at an annual party?
Similar answers:
Americasbirthdaycake
Belatedbirthday
Birthday
Birthdaycake
Birthdaycakes
Birthdaycandles
Birthdaycards
Birthdaycod
Birthdaygifts
Birthdaykick
Birthdaynewyear
Birthdayparty
Birthdaypresent
Birthdaypreset
Birthdayreturns
Birthdays
Birthdaysuit
Birthdaytreat
Birthdaywish
Happybending