Three's company?

Jersey Shore couple Sammi "Sweetheart" Giancola and Ronnie Magro hit West Hollywood hot spot Voyeur Wednesday night and made a new pal: Former porn star and ex-Paris Hilton paramour, Simon Rex.

"I'm havin a 3some with Ronnie and Sammy," Rex wrote on his Twitter during the outing.

But a source tells Us he seemed to have the hots for another star: Jenni "J-WOWW" Farley.

Says a witness, "Simon Rex was all over Jwoww!"

The Jersey Shore gang also befriended Lindsay Lohan, who was at the club.

Outside the club, Paul "Pauly D" Delvecchio told photographers that Lohan is "hot."

Seems like he made a good impression on her.

On her Twitter page, she posted a photo of him, as well as one of Mike "The Situation' Sorrentino," from earlier in the night.