Birthday (song)

"Birthday" is a song by American pop singer-songwriter Katy Perry. It is the third track from her fourth studio album, "Prism" (2013). "Birthday" was released as the third single from "Prism" on April 21, 2014. The lyrics are about celebrating a partner's birthday while Perry makes sexual references. 
It was released on April 21, 2014, and the song became a moderate success. It peaked in the top ten in Canada, the top twenty in the US, and the top twenty-five in the UK. On July 27, 2015, the Recording Industry Association of America certified the song Platinum for sales and streams equal to one million copies shipped.
Music video.
In one version of the music video for "Birthday", Perry dresses up as five different characters attending various birthday parties. They are Goldie (a burlesque dancer), Kriss the Clown, Yosef Shulem (a rabbi/DJ), Princess Mandee, and Ace the Animal Trainer. There is a link to this version of the music video on Katy Perry's official website. All five characters can be seen in the video.