Looks like Lady Gaga isn't a fan of Katy Perry right now. It all started when the Dark Horse singer debuted this snot green hairstyle at her Prismatic World Tour in Belfast, Ireland. It wasn't long before this passive-aggressive message showed up on Gaga's Twitter.



Buzzfeed also reports that Perry's Prismatic show involves a pre-recorded video of the singer sticking her finger into her mouth and spitting up paint. Care to guess who else pulled off the exact same stunt?

Of course, this could all be just mere a coincidence. Lady Gaga herself has been accused of copying Madonna, so maybe she shouldn't make a big deal out being imitated by her peers.