But the celebration Audrina Patridge is attending in Ixtapa, Mexico, this weekend, seems to be more of an athletic variety.
The reality TV star was seen enjoying a jet ski ride, as well as taking part in building a human pyramid, all the while showing off her super-slim figure in a floral black bikini.
Bikini body: Audrina Patridge showed off her slim frame in a black floral bikini as she enjoyed a friend's bachelorette party in Ixtapa, Mexico, over the weekend
Tanned and toned: Audrina credits her mother Lynne for her amazing figure, but says she works hard to maintain it
And Audrina definitely seemed to be enjoying herself on the break, smiling and laughing with her group of friends which included her sister.
Audrina has become famous for her beach-ready body since appearing on MTV reality show The Hills, and is now more often than not seen wearing a tiny two-piece on her own reality show Audrina.
She said recently: 'You know I do certain things to work out and tone my arms and abs and butt… the stair climber and just lifting weights and going to Runyan Canyon and hiking or swimming and dancing.'
Hitting the surf: Audrina donned a life vest as she messed around in the sea
Making a run for it: Audrina jumps off her jet ski and runs to the shore as she shows off her sporting prowess
And the 26-year-old star also credited her mother Lynn for her good genes, adding: 'My mom has a good body, so I’m lucky to have the body I have. I’ve always been in shape; I’ve danced since I was really little and I was on the swim team.'
But while a lot of her figure might be down to genealogy, Audrina admitted there isn't a minute she doesn't think about working out and exercising her body as best she can.
She said: 'Even when I'm just sitting in front of the TV, I lift five-pound weights or do squats. And I wear heels when I vacuum, because it works my calves and my butt!'
Enjoying the sunshine: Audrina held tight to her male friend as they jetted around on the jet ski
Piling up: Audrina finds some thrilled male volunteers to be the base of the group's human pyramid
But it's not only about the working out, as Audrina also has to watch what she eats to stay as healthy as possible.
She said: 'I order what I want when I'm out, but I don't eat all of it. I am not really big on sweets. I don’t like dessert. I don’t like certain kinds of candy I’m not a big chocolate fan.'
As well as her reality show, Audrina has also tried to break into the movie industry with roles in Sorority Row and the upcoming Honey 2.
Enjoying the sunshine: Audrina and her friend looked great in their bikinis as they made the most of their break
Taking a stroll: The pair stroll along the beach as they head back to their hotel
She said in a recent interview: 'I moved to LA originally because I wanted to be an actress, and so far ive got a taste of it. I’ve done some guest stars, and The Hills has gotten me used to the cameras.
'I did Into The Blue 2 and Sorority Row, so I’m getting a taste for it and learning from each movie that I do and it’s a great experience.'-via Daily Mail