Birthday is a song sung by American female singer Katy Perry. The lyrics are written by Katy Perry, Dr. Luke, Bonnie McKee, max martin and Chilkoute, and the music is written by Dr. Luke, max martin and Chilkoute.

Included in Katy Perry's third studio album Prism, as the fourth single of the album, was released by Congressional Records Company in April 20 14.

2. "The moment I knew"

The moment I knew was sung by American country pop singer Taylor Swift, included in her fourth studio album Red, and released as an additional song of the deluxe edition of the album. Taylor released her fourth studio album "Red" on October 22nd 10/KLOC-0, USA.

3. "Birthday Song"

Birthday Song is a song written by Ai Otsuka, which was first recorded in the album Love Chef in 2005.

4. Yesterday

Yesterday is a baroque pop-style song released by The Beatles. It was written, composed and sung by paul mccartney and produced by george martin. It was recorded in The Beatles's studio album "Help! 》。

Happy birthday, written by famous musician Lin, is a song in the released album "Oh, Kiss You". The title song "Oh, Kiss You" of this album is the theme song of TVB drama "I Love Toothbrush Sue" starring it.