Making a brief trip south of the border, Karissa Shannon and Kristina Shannon headed to Cancun, Mexico for the Spring Break 2011 festivities.

The Playboy beauties ventured to the popular locale on Thursday (March 10), with Karissa tweeting, "Taking off to Cancun!!!! I'm so ready to party this party tonight is going to be one memorable party no matter how drunk you are!!!!"

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With their romance continuing to blossom, Ryan Seacrest whisked girlfriend Julianne Hough off on a romantic getaway to Cabo San Lucas, Mexico over the President's Day weekend holiday.

The American Idol host and his Dancing with the Stars lady were spotted on Saturday and Sunday (February 19-20) as they basked in the sunshine at an exclusive resort in the south of the border vacation spot.

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One day after Kourtney Kardashian kicked off the new year in Miami, the E! reality star and her boyfriend Scott Disick, 27, spent some quality time with their son Mason at a private property near Cancun, Mexico.

"Kourtney and Scott seemed very relaxed," an insider tells the new issue of Us Weekly (on stands now).

Clad in an itsy-bitsy string bikini, a super-fit Kardashian, 31, sipped on fruity cocktails by the pool as her longtime beau soaked up the sun while playing with Mason, 13 months. According to an insider, "Scott seemed to enjoy the father-son bonding time" during the drama-free, three-day getaway.

The sunny vacation shows signs of progress for the couple, whose heated arguments were heavily featured on both Kourtney and Khloe Take Miami and Keeping Up With the Kardashians.

"In every relationship, you don't grow unless you go through some hard times," Kardashian explains of her on-and-off love, whom she began dating in 2006. "Growing and learning together has been the biggest change."

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A newly-engaged LeAnn Rimes flaunted a noticeably bustier figure Thursday while sporting a teeny bikini during her vacation in Cabo San Lucas, Mexico with fiance Eddie Cibrian, 37.

"She recently got a boob job," a source reveals to Us Magazine. "She’s always, always been insecure about her size. She was a small A-cup. She often talked about wanting to get implants. She’d say, “I just want a little bit so they’re proportionate to my body.'"

The singer, 28, flaunted her new look while celebrating her engagement to Cibrian. "Cabo!!!!! Sun, bikinis, friends, food, tequila...celebration!!!! Gonna be the best trip!!" Rimes tweeted.

Rimes admitted to Shape last year that she works hard to maintain her picture-perfect bod.

"I'm a competitive person in a lot of ways, so I like a little bit of pressure," she told the mag. "It makes me get to the gym sometimes when I don't want to go, so in that respect it is good, but I try not to let it rule my life."

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Jessica Alba, husband Cash Warren and their daughter Honor Marie Warren were spotted spending some time at the beach in Mexico on January 1, 2011.

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Working on her tan, Jessica Alba was spotted looking superfine on the beach in Los Cabos, Mexico yesterday (December 29).

The “Machete” actress was joined by her handsome husband Cash Warren and their adorable daughter Honor Marie as she relaxed on her much-needed vacation.

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Looking forward to a Mexican vacation, Jessica Alba was spotted catching a flight at LAX International Airport today (December 28).

Joined by her husband Cash Warren and their daughter Honor Marie, the “Fantastic Four” actress made her way through the terminal en route to Cabo San Lucas where she’ll celebrate the New Year’s holiday.

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Fresh off of their joyous engagement news, Vanessa Minnillo and Nick Lachey have been living the good life in Mexico over the past few days.

The former Miss Teen USA looked fabulous in an itsy-bitsy bikini as she showed off her diamond ring while soaking up the south of the border sunshine with her former 98 Degrees singer beau and a few friends.

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Yes, diamonds really are a girl's best friend!

A beaming Vanessa Minnillo proudly showed off her gorgeous engagement ring Thursday in Mexico where she's vacationing with fiance Nick Lachey and some pals.

The ring is an Asscher-cut diamond with baguettes from Bader & Garrin.

"We're excited and incredibly happy about our engagement and we look forward to a wonderful future together," the couple announced in a joint statement after word leaked of their impending nuptials.

Lachey, 36, popped the question in traditional form to Minnillo, 29, last Thursday.

On his Twitter page Friday, Lachey wrote: I popped the question on bended knee. I do a lot of squats so my knees are very strong.

The couple began dating in 2006, a year after he split from wife Jessica Simpson.

Lachey and Minnillo broke up for a while last year before reuniting.

No wedding date has been announced.

Interesting fact: Lachey and Minnillo share the same birthday; on Tuesday, November 9th, she turns 30 while he turns 37.

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She’s always up for a good time, and Nicole Richie was spotted landing in Los Angeles yesterday (September 20) following a bachelorette party in Cabo San Lucas, Mexico.

The “Simple Life” actress was joined by her celebrity lady friends Christina Aguilera and Samantha Ronson as she gathered her luggage and headed home.

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Kim and Kourtney Kardashian with partners Scott Disick and Austin Miles unloaded their luggage and then hit the beach in Mexico. Kim and Scott's baby, Mason Dash looked on in stripes.

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Jenner was wearing a Rafael Marquez jersey to show his support for Mexico in Friday's 2010 FIFA World Cup opener against host South Africa.

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