So...this is the tweet that Lady Gaga sent out yesterday:
It looks like green hair and mechanical horses are the thing now 👀— Lady Gaga (@ladygaga) May 8, 2014
And here are some pics from Katy Perry's "Prismatic World Tour" that recently kicked off:
Remember in previous years, Gaga performed in green wigs and rode mechanical horses. Is she calling Katy out for copping her style?
Photos: Getty Images