Life a beach for Vanessa Minnillo as she soaks up the Mexican sun with new fiancé Nick Lachey

It's another day another bikini for Vanessa Minnillo.The pretty TV presenter is currently enjoying a fun-filled break in Mexico with fiancé Nick Lachey and some friends. The couple are celebrating their engagement, which they announced last week, as well as their birthdays which fall on the same day - Vanessa turns 30 and Nick 37, tomorrow.

Vanessa Minnillo continued to celebrate her engagement to Nick Lachey, as well as her 30th birthday, in sunny Mexico yesterday

Vanessa has been showing off her amazing body, and huge engagement ring, in a variety of little bikinis

Minnillo showed off her amazing body in a teeny tiny pink bikini and was careful to keep the sun from damaging her complexion too much by keeping a large floppy sun hat in place as she lounged poolside. She also kept her huge sparkler in place, firmly on her ring finger, and who can blame her?

The brand new platinum and diamond engagement ring by jewellers Bader & Garrin, is said to be worth an estimated $125,000.

Vanessa took a break from all that hard lazing around in the sun to indulge in a little stretching exercise

'We're excited and incredibly happy about our engagement and we look forward to a wonderful future together,' the couple said in a statement last week. It will be a second marriage for Nick, who is divorced from singer Jessica Simpson.

The couple have been dating on and off since 2006. 'They're so happy, doing great,' a source told America's Us Weekly. 'Thrilled about it.' One person that purportedly isn't so happy is Simpson.

A source, who claims to be a close friend of the Dukes of Hazzards star, tells celebrity website Popeater: 'Even though Jessica wants to be happy for Nick, this is a very difficult time for her.

'Nick was the love of her life then, man, and he was her first, so she will always have a very special place in her heart for him. She's deeply saddened.'

It's a case of another day another bikini for Vanessa Minnillo

Minnillo was sure to protect her pretty face from the harmful sun rays with a wide brimmed sun hat that she kept firmly in place

Former 98 Degrees star Nick and pop singer Jessica were married in 2002 but split three years later, when Jessica filed for divorce citing irreconcilable differences. Their married life was caught on cameras for their reality MTV show Newlyweds.

Jessica later admitted she was furious when Nick jumped back into dating very soon after they split up. She told Elle magazine in 2007, 'Oh, it hurt me. Two or three weeks later? Yeah, I'd say it kind of hurt me.'

As well as celebrating their engagement, and Vanessa's 30th birthday, the couple are celebrating Nick's 37th - the same day as Vanessa's

But the 30-year-old eventually moved on, enjoying high-profile romances with singer John Mayer and Dallas Cowboy Tony Romo. Simpson is now in a happy relationship with NFL football player Eric Johnson.

The engagement announcement comes just a week after Nick and Jessica had an awkward encounter after both turning up for dinner dates with their partners at Red O on the same night. Sources say the former couple stayed well clear of each other all night.

Vanessa accessorised her white bikini with a flower in her hair

And there was no danger of the two couples colliding at the weekend. While Nick and Vanessa carried on their joint celebrations in Mexico and the former Miss Teen USA wowed in a variety of colourful little bikinis, the first Mrs Lachey was bundled up warmly at Dulles airport in Washington DC.

Simpson looked cute in some tight black jeans and a multi-coloured poncho style cardigan. She was putting on a brave face for the cameras, holding hands with Johnson as they strolled through the airport. Hopefully they weren't on their way to Mexico.

Nick who? Jessica Simpson was putting a brave face on it when she was spotted in Washington yesterday

Simpson held hands with her boyfriend, NFL player Eric Johnson as they walked through Dulles airport in Washington DC