If you ever doubted Lisa Vanderpump and Kyle Richards animosity was real -- you need to watch their insane fight over Faye Resnick!

Either these two Real Housewives are Oscar worthy actresses, or there really is no love lost between them -- but, you can watch the video right here on Breaking Celebrity News and judge for yourself!

Their crazy catfight was caught on camera during taping of the Real Housewives of Beverly Hills reunion show at the end of the explosive season three -- and it appears their ongoing feud has gone nuclear!

It all starts with host Andy Cohen reading out a question to Richards from a Housewives fan: "Kyle sat on the fence during all the drama but it always seemed like your friend Faye had plenty to say - is Faye on your payroll -- is she a friend, or some one who invoices you?"

And, let the fireworks begin!

Richards starts off calmly enough: "She is not on my payroll - oh, well, she designed my home, but no, she is not on my payroll...."

But, before she can finish Vanderpump jumps in:  "Oh come on! She works for you!" She exclaims in disbelief.

Then, as Kyle tries to deny the accusation, the action really ramps up!

Vanderpump tears into Richards accusing her of using Resnick as her mouthpiece for attacks against her and against Brandi Glanvile -- and slams Faye, claiming, "She's  so desperate for camera time, that she will go