Aeropostale: happy happy birthday

Hey! I heard this song in Aero, currently on their playlists. Its a pretty cute girly voice. and at one point, the lyrics are just : "happy happy birthday {sth sth sth} happy happy birthday....."

thanks! PM me with the answer if possible, i dont check here often!

I work at aeropostale! this is the name of the song:

Altered Images - Happy Birthday