There’s always been a bit of a rivalry between these two and from the looks of things, they’ve both pushed the envelope to see who can win the prize for the craziest outfit changes the land of pop has ever seen.

Lady Gaga allegedly dissed Katy Perry during her Twitter Question & Answer with Mother Monster interview by tweeting:

“It looks like green hair and mechanical horses are the thing now [eyeballs].”

Nothing beats a good pop music rivalry. Let the drama begin!