advance happy birthday or advanced happy birthday? I know that "Happy birthday in advance." is preferred. I just want to know if which between the two choices is right.
Neither "advance happy birthday" nor "advanced happy birthday" is correct. Like you said, the correct way to say it is "Happy birthday in advance." If you want to say it a different way, go with "Early happy birthday." (But even that doesn't sound nearly as good as "Happy birthday in advance.")