Katy Perry has been teasing the music video for "Birthday," the next single off of her fourth studio album, Prism.

That being said, TMZ reports that Katy left children "in tears" at a recent birthday party where she dressed up like a clown, attacked a guy with a pinata stick, and staged a car accident -- all for the music video.

Earlier this week Katy showed a preview of the prank on "Jimmy Kimmel Live," though the clip did not show the entire fallout.

Check out the clip from "Jimmy Kimmel Live" below.  And click here for the footage of the birthday party clown we knew we never wanted.

Way to scar children for life, Katy.

Katy Perry on 'Jimmy Kimmel Live!' - Watch More Celebrity Videos or Subscribe



Photo Credit: YouTube (Katy Perry's VEVO Account)

Video Credit: TMZ