Nicole Richie Bikini Pictures

Jessica Alba and Nicole Richie had a bikini beach hangout in St. Barts yesterday. The two stars are spending time in the Caribbean with a group of friends to celebrate pals Kelly Sawyer and movie producer Jamie Patricof's wedding anniversary. The group flew down on Wednesday and have been grabbing all the beach time they can get. Over the weekend, Jessica wore a bikini as she snuggled with husband Cash Warren and did cannonballs off of a barge. Meanwhile, Nicole showed off her bikini body on Saturday when she slipped into a black string two-piece to chat with her girlfriends. Nicole's husband, Joel Madden, didn't make it down to St. Barts for the celebrations, but he did pop up at the Logie Awards in Melbourne on Sunday.

Nicole Richie slipped into a black bikini for a dip in the ocean at St. Barts on Friday. She wore the two-piece and House of Harlow sunglasses as she waded into the waters while chatting with two female friends. The trio laid out on a floating barge to soak up the sun before Nicole jumped off into the beautiful blue waters. Nicole and her friends are currently in St. Barts to celebrate the wedding anniversary for their friends Kelly Sawyer and movie producer Jamie Patricof. Jessica Alba is also among the group of pals who traveled to the tony vacation spot for the occasion, and she and Nicole were spotted sharing a chat and drinks earlier this week. Jessica has been getting in on the swimsuit action as well, donning a string bikini earlier this week for a cannonball contest with husband Cash Warren.

Jessica Alba and Nicole Richie took to relaxing poolside today in St. Barts. Jessica chatted with Nicole on lounge chairs after stepping aside earlier in the day to check her phone and making her way through a crowd with her husband Cash Warren. The two friends have been trading off fedora duties over their past two days on vacation together.

Jessica and Nicole are currently in the tony vacation spot as part of a 10-year anniversary celebration for their friends, movie producer Jamie Patricof and model Kelly Sawyer. Jessica wore a bikini on Wednesday as she splashed around the ocean with her Cash, but opted to cover up her two-piece with a short tunic while hanging out with Nicole and a group of pals. However, Cash was still enjoying his ocean playtime as he went snorkeling near the beach while Jessica took photos.

Nicole Richie was in her bikini again yesterday to hang out on her balcony in Cabo San Lucas. She went south of the border for a weekend to attend the wedding of publicist Meredith O'Sullivan at Las Ventanas al Paraiso. Jessica Biel was among the guests. While Nicole hung out with a group of friends at the resort and out on a golf cart yesterday, Jessica went shopping and caught a flight out of town. The last week has been jam-packed with travel for Jessica, who also fit in a visit to the Puerto Rico set of her fiancé Justin Timberlake's Runner, Runner.

Jessica Biel returned to LA Friday after visiting fiancé Justin Timberlake on the Puerto Rico set of Runner, Runner, and it didn't take long before she was off on her next excursion. She arrived in Cabo San Lucas in time for publicist Meredith O'Sullivan's wedding rehearsal dinner last night at Las Ventanas al Paraiso resort. Nicole Richie flew in as well and arrived at the hotel yesterday. Nicole Richie wore a bikini to soak up a bit of sun before changing for Meredith's first event. The R & R comes after a busy week for Nicole, who launched her first fragrance called, appropriately, Nicole.

Nicole Richie had a relaxing day in the sun at her hotel in Miami Beach yesterday. Nicole wore a tiny purple bikini for the pool day, which came after a sexy turn on the red carpet Tuesday night. Nicole stepped out for a party at the Shelborne hotel to celebrate her Ocean Drive digital cover. The evening also marked the second episode of her new reality competition, Fashion Star. Nicole made another small-screen appearance last night, when her interview with Chelsea Handler aired on Chelsea Lately. Nicole joked about her shorter-than-average height, saying that model Elle Macpherson, who hosts Fashion Star, has to sit down in order to chat with her.

Nicole Richie rocked a bikini in Cabo San Lucas on Friday. She was in a strapless black two-piece to lounge by her hotel pool with a similarly swimsuit-clad Samantha Ronson. The girls also showed some skin Saturday during a jaunt to the beach. They're south of the border, hanging out with other pals like Jessica Simpson and Ashlee Simpson. Any rumors that Nicole and her Fashion Star cohost Jessica are feuding were put to rest when the girls met up for lunch yesterday. The fun vacation comes just days after Nicole Richie turned 30. We celebrated by looking back at some of her sweetest moments with pals, and it seems those real-life BFFs whisked her away for a couple days of fun in the sun. On the actual day, last Wednesday, Jessica tweeted to Nicole, "Happy birthday Nicole Richie! Today don't feel guilty about mixing your pressed green juice with vodka. Huge hug and boobie bump!"

Nicole Richie took a break from her work and headed south of the border for a weekend getaway with friends like Christina Aguilera and Samantha Ronson in Cabo. The girls put on their bikinis to lounge by their hotel's pool, and they later hit the town to celebrate what's rumored to have been Nicole's bachelorette party. Nicole looked healthy and happy during their trip — click through to see their girls-only fun!