Kristina Shannon At Philippe by Philippe Chow

Despite the rain, Kristina Shannon manages a big smile as she dines out at Philippe by Philippe Chows in West Hollywood, CA.

Credit: Zimbio

Photos by PacificCoastNews.com

Shannon Twins' Birthday Celebration At Vanity

Karissa and Kristina Shannon's 21st Birthday Tour hit Vegas and the Worlds Most Famous Playmate Twins made history in Vanity partying like it was greatest day of their lives to the sounds of Eric D Lux.

Credit: Spy On Vegas

The Shannon Twins Celebrate At Sugar Factory

Kristina and Karissa Shannon celebrated their 21st birthday's at Sugar Factory on October 2, 2010 in Las Vegas, Nevada.

Credit: Film Magic

Kristina Shannon At Michael Boychuck's Salon

Kristina Shannon gets ready to celebrate her birthday with a spa night at Michael Boychuck's Color Salon at Caesars Palace on October 2, 2010 in Las Vegas, Nevada. Also pictured, Amanda Vanderpool and hip hop artist, Test Me.

Credit: Wire Image

Karissa & Kristina Shannon's 21st Birthday Bash

Making for quite the reason to celebrate, twin sisters Karissa and Kristina Shannon rang in their shared 21st birthday with a booze-fueled party in New York City on Friday night (October 1).

The Playboy beauties - who turned 21 at midnight - first went to dinner at Via De Mille restaurant in SoHo before heading to their very own party at Greenhouse nightclub.

Definitely not a PG affair, Kristina was going wild as she danced around barefoot while drinking straight from the bottle alongside her sis.

Meanwhile, Karissa looked delighted as she unwrapped a gift from her boyfriend Sam Jones III - as her man doted her with a pair of Christian Louboutins which cost a cool $1495.

Credit: Celebrity Gossip