A few weeks ago, Rihanna stirred up rumors of a collobaration with Lady Gaga on twitter by tweeting that she had laid down a #monster hook for one of her favorite artists.

It seems the speculators were in fact correct. Rihanna added fuel to the fire this weekend by tweeting to Mother Monster, "Lastnight.... YOU were in my sex dreams!!"

Gaga responded with, "doing really NASTY THINGS *dancing gaga*." Sounds lyrical, does it not?

Gaga is finalizing ARTPOP this week, but seems to be reluctant to give it up.