Happy Birthday (disambiguation)

Happy Birthday may refer to:
*, a song by HachioujiP featuring Hatsune Miku.
*, a song by IMPOSTOR featuring Tsurumaki Maki.
*, a song by Kaden-P featuring Kagamine Rin and Len.
*, a song by matsukaze project featuring Hatsune Miku.
*, a song by Oribe Ryou featuring Hatsune Miku.
*, a song by Sasuki featuring YOHIOloid.
*, a song by Shijuukon-P featuring GUMI or SF-A2 miki.
*, a song by Shiraishi Fumin featuring Chis-A.
*, a song by Sola Kurage featuring Hatsune Miku.
*, a song by SynthicaMusic featuring RUBY.
*, a song by Torte featuring Sukone Tei and Nagone Mako.
*, a song by Neptury featuring SeeU and SeeWoo.
*, a song by GaGain featuring SeeU.
See also Birthday (disambiguation), Tanjoubi (disambiguation).