KATY PERRY Throws It Back For Her Next Single's Cover!

Earlier today, Katy Perry honored the throwback tradition on  Twitter by sharing the cover of her next single!

Yes, "Birthday" will be Katy Perry's fourth single from her latest album "Prism"! In the single cover, you'll see a young Katy sitting next to her blurred sister Angela. On her Twitter account, Katy said:

"IF you would like to see my sister's amazing face/pose get #BIRTHDAY trending to the top & I will UNLOCK the genius for you... Hahahahaha"

And because the "Dark Horse" singer's 52++ million followers joined forces to make #BIRTHDAY the top trending topic, she stood up to her promise and unlocked the genius!

Isn't her sister Angela's pose really amazing?

What can you say about Katy Perry's "Birthday" single cover? Feel free to leave your comments below!