From TMZ:
It all went down at a fancy party inside a nail salon in Manhattan … when Erica Mena got into a heated discussion with a blonde lady named Tiffany.
Multiple people who were at the party tell us the two were squabbling over a man … and Tiffany implied that she had hooked up with Erica’s BF in the past.
We’re told Erica DECKED Tiffany … and all hell broke loose.
People rushed in to break up the girls … but both women made it clear — THEY WANTED TO FIGHT.
At one point, a man steps in to restrain Erica … and she threatens to slap him in the face unless he got out of her way. She even gives the dude a pretty nasty forearm to the body.
But just when she thinks she’s safe, Erica is BLINDSIDED by Tiffany … who somehow crept up from the side, and pounced on her prey like a ferocious ocelot (look it up, they’re awesome).