01/09/2011 10:24 am ET Updated May 25, 2011

Rihanna, Nicki Minaj Tweet About 'Fly,' Joke About Lesbian Hookup (PHOTO)

Are Rihanna and Nicki Minaj collaborating on more than just 'Fly'?

The pop star and rapper duet on a hot new single called, 'Fly,' and they're on set together working on the music video. Apparently, things turned a bit steamy (if not jokingly), if their tweets can be believed.

After tweeting a voluptuous picture of the two, Rihanna posted: "Me and Nikki in our new crib, lol! Gettin busy on set of FLY!!! Its so hard to keep my hands off!"

Not to be outdone, Nicki responded, "@rihanna lol. If we're gonna liv 2gthr and hook up u gotta learn how 2 spell my name! Lmaooooooo. ---- Gossip Gossip ni#@a just stop it! :p"

And it didn't end there -- RIhanna got back to her, writing, "@NICKIMINAJ b***h don't u hear me askin what my OWN name is??? Lol! My bad, I'll make it up to u *wink*"

Of course, it's probably all in good fun, but with their big new track and award-winning ways, what a duo that would be. Hey, Rihanna is recently single.