WWE DIVA TAMMY SYTCH
SIGNS ON THE DOTTED LINE
I'VE DONE A PORN!!

1/21/16 7:10 PM PST

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. Vivid's already running a teaser clip, but we're told she'll be shooting new footage for the final release, which has a very Farrah Abraham-ish title -- "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" ... she was down.