Rihanna Dating Big Sean? Drake's Ex Parties With Rapper at Kevin Durant Pool Party [PHOTO]: Sorry Beyonce & Jay-Z, New Hip-Hop Power Couple?!

Rihanna's totally over former flame, Drake. Apparently, the 26-year-old Barbadian songstress is ready to romantically move-on with yet ANOTHER rapper!

But this time, not Chris Brown. Rumors suggest that RiRi just started dating Big Sean!

According to the infamous gossip webloid MediaTakeOut.com, Rihanna and the Hall of Fame emcee were spotted "flirting" at NBA superstar Kevin Durant's epic pool party in LA on Saturday (July 5). Insiders reveal that the two singers actually arrived to the bash together - and they were definitely acting like a couple!

Check out a photo of RiRi chillin' with her "new man" here.

They kept things very casual - the "Pour It Up" beauty spent a lot of time chatting with her gal pals while Big Sean invited a bunch of his homies to the event.

So - do RiRi and the "Mercy" rapper make this summer's hottest hip-hop power-couple? Move over, Beyonce and Jay-Z!

Rihanna seems to be enjoying the single life, so who knows if there's really a "blossoming" relationship in-the-works. Maybe they'e just good friends, having some fun.

What do Mstars readers think?

Well, if the rumors are indeed true, enjoy this Rihanna and Big Sean "mash-up" to celebrate!