Two Andy Warhol silkscreen canvases of Jacqueline Kennedy in the artist's studio. Photo: Billy Name/Ovoworks/Time Life Pictures/Getty Images, 1964

An undeniable pack rat, artist and icon, Andy Warhol saved everything.

A slice of Caroline Kennedy's wedding cake? A Joey Ramone-autographed record? Gems, antiques, even nut bread? All thrown in a "time capsule" box, taped up and shipped to a New Jersey storage facility, the AP reports.

But get this! Archivists at the Andy Warhol Museum in Pittsburgh, PA found a nude Jacqueline Kennedy Onassis poster signed by Jackie O, herself: "For Andy, with enduring affection, Jackie Montauk."

Researchers had the handwriting analyzed and say the signature is a match, the AP story says.

Archivists suspect the poster -- made for Hustler magazine after porn magnate Larry Flynt bought the photo from a paparazzo -- was sent to Warhol as a joke, the article goes on to say.

We can't wait to see what else turns up in the more than 600 boxes of Warhol "junk!"

For a photo gallery of another iconic Kennedy -- Carolyn Bessette -- click here.