Perry posted an Instagram video of her latest hair transformation with pro Jesus Guerrero Katy Perry is the latest star to hop on the bob bandwagon ... to test run the hairstyle with a wig ...

Katy Perry has always rocked some of the boldest ... to ask her fans for their opinions on her brand new hair cut, a black bob in the style of "The Rachel," which you can see in the clip below ...

And no, I don't think they planned it—the bob is simply the cut of the moment ... a wig (but good luck to you if you try to google "Katy Perry wig American Idol," if you know what I'm saying).

having just digitally witnessed Katy Perry chop her long black lengths into a deliciously choppy layered short haircut. Combining both the shaggy wolf cut trend and the bob takeover, we give you ...

having just digitally witnessed Katy Perry chop her long black lengths into a deliciously choppy layered short haircut. Combining both the shaggy wolf cut trend and the bob takeover, we give you ...