Brody Jenner received a surfboard-themed cake for his birthday.

Brody Jenner along with girlfriend Avril Lavigne celebrated Jenner’s birthday in Sin City Sunday night at The Bank Nightclub at Bellagio.

Jenner, the American television personality and son of Olympic decathlete Bruce Jenner, celebrated his 28th birthday at The Bank Nightclub at Bellagio with his rocker girlfriend Lavigne and a group of friends from Los Angeles including former “The Hills” alum Frankie Delgado.

The couple arrived in Las Vegas coming straight from Jenner’s step-sister Kim Kardashian’s highly anticipated wedding with New Jersey Nets forward Kris Humphries. After tweeting to his followers, “The ship has arrived! VEGAS TIME BABY…Gonna be a great one,” the couple joined their friends for a special group dinner at Yellowtail Japanese Restaurant & Lounge at Bellagio, where the two were spotted cuddling with each other at the table while enjoying Yellowtail’s greatest hits, the Big Eye tuna pizza, rock shrimp and lobster carpaccio by Executive Chef Akira Back.

The group ended their feast by singing “Happy Birthday” to Jenner in Yellowtail’s private dining area. The group then made their way to The Bank Nightclub where they hung out in their VIP section dancing to the sounds by DJ Karma.

While at his table, Jenner was presented with a West Coast beach-themed birthday cake decorated with surfboards, palm trees and the names of Jenner’s favorite surfing spots in California, while Lavigne and his friends toasted the birthday boy. Later in the evening, Jenner and Lavigne chatted with American rapper Gucci Mane, who stopped by their table before getting behind The Bank’s deejay booth to give an impromptu performance of his smash hit “Wasted” to the packed crowd. After enjoying the lively performance, Jenner and Lavigne finished the evening taking one last round of birthday shots with their group before leaving The Bank around 4 a.m.

(08/21) Celebrating his birthday at The Bank Nightclub at the Bellagio Hotel

First of all I want to wish Brody Jenner a Happy Birthday! I sincerely hope he has the most amazing day, He deserves nothing but the best … I hope he can spend this special day with his family, friends and all the ones he loves & that all his dreams come true.

Don’t expect everyone at the Kardashian-Humphries wedding to be perfectly behaved!

The bride-to-be’s stepbrother, Brody Jenner, is planning on letting loose during Kim Kardashian and Kris Humphries’ celebrations Saturday night. (Brody’s father, Bruce, has been married to Kim’s mom, Kris, since 1991.)

“Getting a nice 10K run in before the long drive up to the wedding,” the 27-year-old former Bromance star tweeted Saturday. “Congrats, Kim. Love you.”

But Brody — who has been romantically linked to Avril Lavigne since 2010 — alluded to his partying plans for Saturday night. “Oh yeah,” he added. “And it’s my birthday at midnight. RAGING tonight!”

Kim’s brother Rob also seemed up for some fun. He retweeted Brody’s tweet, adding, “I’m with Bruce tonight and we are gonna RAGE!!!”

Humphries, 26, joked with his future brother-in-law earlier about whether he should go with a “mustache or no mustache for the wedding?”

Rob’s advice for the NBA star? “Get a hair cut and shave your mustache,” he said.

Kim, 30, will probably appreciate a clean-shaven beau. Her pre-wedding rituals? “Spray tanning, nails, a midnight call to Anastasia to do my eyebrows,” she told Ryan Seacrest Friday, adding that she feels completely “calm” about her upcoming “I do’s.”

Also I added some photos of Brody and Avril Lavigne shopping in Los Angeles

(08/19) Channel Islands Surfboards in West Hollywood

Brody Jenner arrives at the premiere of Columbia Pictures’ ’30 Minutes Or Less’ at Grauman’s Chinese Theatre on August 8, 2011 in Hollywood, California

(08/08) “30 Minutes Or Less” Los Angeles Premiere