Rob Pattinson And Kristen Stewart Twilight Cast Celebrate 21 B-Day

Twilight cast and crew helped Kristen Stewart in Vancouver to celebrate the 21 largest private party Saturday Rockwell Bar & Grill in Squamish.

Clients, including Beau Robert Pattinson, have tasted oysters and food history, an insider tells Us.Magazine.com. And all around 22 hours, the birthday boy presented with a "simple chocolate cake" to a private catering company.

"Rob has led the public to sing it and you could tell she was so embarrassed, but in a cute way!" same source. "Everyone was in good spirits, but it was a bittersweet night (which filming is almost finished)."

While the franchise might conclude, Relationship Stewart and Robert Pattinson showed no signs of slowing.

"Rob and Kristin have been together all night," says insider. "They held hands and kissed his cheek long time."

It seems that the actor will certainly have something to remember the night, another insider says everyone has planted in a motorcycle.

"Rob was so excited for Kristen and each take turns to ride a horse," says the source. "Kristen has learned to ride a dirt bike in New Moon, when I thought it would be appropriate. Rob oversaw as she sat with her to make sure it was okay. It looked like a great time, and this is something that can really enjoy! "

Kristen Stewart Hides from Teenage Girls

Kristen Stewart's hugely popular role as Bella Swan in the Twilight Saga movies has made it difficult for her to blend in, and she finds herself hiding from fans of the franchise to avoid uncomfortable situations.

She said: "There's no way to eloquently put this. I just can't go to the mall. It bothers me that I can't be outside very often. And also to not ever be 'some girl' again. Just being some chick at some place, that's gone.

"Masses of girls identified with Bella in a really profound way, for want of a better world. The connection that I've seen people have. I've seen it physically. It's the characters they're flipping for."

Although the 20-year-old actress finds them terrifying, Kristen revealed she is conscious of how much the books and movies mean to the fans and hopes she is doing the character of Bella justice for them.

She said Bella is "a character who is embedded in so many people's psyches at this point.”

She added: "It's starting to enter my head a lot more than it used to because it's at the end and it's come such a long way. I just want the fans of the book to be happy. I don't necessarily care about anyone else."

Kristen is enjoying a successful career -- making a reported $25 million for the fourth and fifth installments in the vampire franchise -- but she says she would not have become an actress if she hadn’t started so young.

Of her first role at nine years old, she told Vogue magazine: "At that time I just thought it was fun. I don't think I would ever have been able to be an actress had I not started at nine years old. I would have been the last person to stand up and say, 'I'd like to star in the play.’"

Kristen Stewart And Robert Pattinson Film 'Twilight: Breaking Dawn'

Kristen Stewart and Robert Pattinson recently stripped down to a bikini and swimming trunks to film a scene for "Twilight: Breaking Dawn," the final installment of the vampire romance saga, in Brazil.

Stewart, 20, and Pattinson, 24, were photographed near a waterfall, as seen in pictures posed on Us Weekly's website. The pair, who play Bella Swan and her vampire love Edward Cullen, have for months been rumored to be involved in an off-screen relationship but have not confirmed this.

Stewart showed off a slim figure in a bright bikini while Pattinson donned red swimming trunks. The two plan to film "Breaking Dawn" over the next eight months, shooting some scenes in Baton Rouge, Louisiana.

Stewart said in October that while she's "incredibly pregnant" in part of "Breaking Dawn" but had dieted for weeks to prepare for scenes in which Swan is not expecting.

The "Twilight" films are based on the hit novels by Stephenie Meyer. "Breaking Dawn"'s first part is set to be released on November 18, 2011 and the second part is due to hit theaters on Nov. 16, 2012.

"Twilight" screenwriter Melissa Rosenberg told OnTheRedCarpet.com in July that "Breaking Dawn" may contain sex scenes.

Stewart has also said she recently tried on several prosthetic bellies for "Breaking Dawn", which sees her marrying Cullen, turning into a vampire and giving birth to their child, Renesmee. The older version of the character is to be played by 9-year-old Mackenzie Foy.