The gang heads home after their Italian jaunt and dive back into trouble.

The cast of Jersey Shore invaded Las Vegas Saturday night and it was all in support of another reality hit, Real World, RadarOnline.com has learned.

PHOTOS: Real World Meets Jersey Shore In Sin City

Deena Cortese, the newest cast member of Jersey Shore, and veteran Pauly D were front and center for the Real World Las Vegas 2011 premiere party held at Club Vanity in the Hard Rock Hotel Casino.

Real World Las Vegas stars Dustin Zito and Adam Royer also came out to party.

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Deena and Pauly D will be in Sin City all week co-hosting Spring Break at the Palms for MTV.

Pauly’s a regular DJ at the Palms, and for this occasion he will be spinning tunes by the pool, joined by Wiz Khalifa, Pitbull, Lupe Fiasco, Snoop Dogg and Jason Derulo.

PHOTOS:  Jersey Shore Guys Show Off Their Beach Bods

Sammi “Sweet Heart” Giancola will be joining Deena in Vegas next weekend to celebrate her 24th birthday.  The pair will be co-hosting at the new Chateau Nightclub  on March 12.

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