Kathy Griffin is Maury Povich's biggest fan

Kathy Griffin dropped by "Jimmy Kimmel Live" and confessed that she's Maury Povich's biggest fan.

Kathy loves the talk show host so much that she personally contacted him to get tickets to a taping of his show.

But Kathy didn't want her celebrity status to detract from Maury's actual guests ... so, she went in disguise and sat front row. See if you can spot her.

GUEST: "... he's the father of my baby!"

Yep, that was Kathy ... in a bad wig and a Maury t-shirt.

She actually previewed the look on Instagram -- and told Jimmy it's her proudest work yet.

Kathy's kind-of episode of "Maury" has yet to air -- so check your local listings and keep your eyes out for this.

GUEST: "... he's the father of my baby!"