WWE fans rejoice -- Tammy Sytch has stripped down to have sex on camera -- she signed her deal with Vivid Entertainment.
Sytch -- aka ex-diva Sunny -- tells TMZ she and Vivid honcho Steve Hirsch recently came to an agreement ... and she quickly got in the sack. Her porn's already been shot and edited and the title has a definite Farrah Abraham feel -- "Sunny Side Up: In Through the Backdoor."
Tammy says Hirsch's original offer of $100k wasn't quite enough but she says once Vivid came back with something "much, much higher" .