Pitbull — If Ryan Seacrest Didn’t Sue Me, Lindsay Lohan Shouldn’t Either!

Pitbull is invoking the little known “Seacrest Defense” in his legal battle with Lindsay Lohan — claiming in new docs that if Ryan Seacrest didn”t sue him for mentioning him in a song … LiLo shouldn”t either!

As our sources first reported, Lindsay is suing Pitbull (along with Ne-Yo and Afrojack) for namedropping her in the song “Give Me Everything.” She claims the lyric –– “I got it locked up like Lindsay Lohan” — caused her “irreparable harm.”

In legal docs filed this week in New York, Pitbull responded to the suit and pointed out that he rapped about Seacrest in the same song — and noted Ryan not only didn”t sue, but Pitbull performed the song as part of a New Year”s Eve show … hosted by Seacrest!

Translation — Seacrest has a sense of humor, Lindsay does not.

Pitbull also cited the lesser known First Amendement in his bid to get the case dismissed. 

A judge has yet to rule.