MTO SHOCK EXCLUSIVE: It's Going DOWN . . . Rihanna Fires The FIRST SHOTS At Nicki Minaj . . . It's Gonna Be A SUPER FIGHT!!! (Who Ya Got . . . Nicki Or RIH??)


It's a MEGA-FIGHT in the making. Nicki Minaj the biggest female rap star of the past decade vs Rihanna the BIGGEST female pop star of the last decade.

For weeks Rihanna has been throwing little jabs at Nicki Minaj - by clearly taking Remy Ma's side in the whole "Shether" mess. But yesterday Rih threw the first OFFICIAL BLOW.

Yesterday Rih liked a post Remy hash-tagged with the title of her lethal Nicki Minaj diss track "ShEther"...