Did Lady Gaga Throw Shade At Katy Perry?

Ew. Lady Gaga may have thrown some shade at Katy Perry and her Prismatic Tour via Twitter last night. Gaga tweeted:

Katy’s tour kicked off Wednesday in Belfast, Ireland where she rocked green hair and rode an Egyptian horse. The tour looks fabulous and you can check out more pics here! Now back to the drama….

Remember Gaga riding in to the AMA’s on her white mechanical horse? It’s kind of obvious she is calling out Katy Perry BUT are these two just playing around or is the feud serious? I thought Gaga was all about sending a positive message on the Internet so throwing shade at Katy would be super phony.

What do you think of Gaga’s shade? Who’s side would you be on if this fued is for real?