Alessandra Ambrosio steps out in a revealing red dress WITHOUT her engagement ring hours after denying reports she has split from fiancé

PUBLISHED: 01:37 EST, 18 October 2013 | UPDATED: 07:39 EST, 18 October 2013

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Alessandra Ambrosio quickly quashed rumours that she was splitting fiance Jamie Mazur.

And hours later the 32-year-old Brazilian Victoria's Secret model made a radiant appearance at the Wallis Annenberg Center for the Performing Arts Inaugural Gala presented by Salvatore Ferragamo in Beverly Hills on Thursday.

However, while Ambrosio stunned in a typically sexy plunging gown, it did little to detract from the lack of bling on her ring finger as her engagement ring was nowhere to be seen.

Fixed grin: Alessandra Ambrosio pasted on her most winning smile at the Wallis Annenberg Center For The Performing Arts Inaugural Gala Presented By Salvatore Ferragamo - but she left home with her engagement ring

Professional smile: Alessandra, 32, hid any hint of problems in her personal life as she put on her model's mask

Professional smile: Alessandra, 32, looked stunning her sexy red outfit on Thursday

A little wobbly: Even though she walks in heels for a living, Alessandra struggled to stand up straight in her high shoes at one point

What split?: Alessandra poses with Karolina Kurkova and designer Rachel Zoe at the star-studded event

The elegant 5'9" Angel flashed her long legs and some side cleavage as she posed up a storm.

Throughout the whole jaunt down the red carpet, Alessandra had her best professional smile fixed for the cameras.

But there was no sign of the 3 carat square cut emerald with Micropave pave band she usually sports on her left hand despite denials of a split which seemed a little odd if she was keen to put the rumour mill to bed.

Reports had emerged earlier this week that the Brazilian model and her fiance had been 'living apart' according to Life & Style magazine.

A source told Life & Style magazine: 'They’ve been living apart. They’re still on friendly terms because of the kids and spend time together, but for now, they are separated and there will be no wedding.'

The Victoria's Secret Angel and the businessman have two children together: five-year-old daughter Anja and son Noah, 17

And on Wednesday, Alessandra and Jamie left the youngsters at home to attend the Atoms For Peace concert at the Hollywood Bowl.

There certainly didn't seem to be any trouble in paradise between the couple as they kept close to each other and wore small smiles on their faces.

Shining moment: Alessandra Ambrosio looked stunning in a bright red gown at the Wallis Annenberg Center for the Performing Arts Gala in Beverly Hills on Thursday... but she left one accessory at home her engagement ring

Perfect pose: It is the Victoria Secret's Angel's job to look beautiful no matter what, and she fulfilled that role to the fullest

The previous day the pair attended the Day By Day fashion show in Los Angeles where they sat side by side in the front row.

However an onlooker told Life & Style that things didn't seem so peachy between the Brazilian model and her man on this occasion.

'They arrived and left separately,' a source said. 'She showed up smiling with two friends and hung out in the VIP area about 30 minutes before the show started. Jamie arrived with a pal just before it began.'

What split?: Alessandra poses with Karolina Kurkova and designer Rachel Zoe at the star-studded event

The insider added: 'They sat together to watch the show, but as soon as it ended, Jamie and his friend left while Alessandra hung around to talk to her friends.

'She then went to the afterparty at Wax Rabbit — Jamie was nowhere in sight.'

Alessandra, 32, and Jamie, who got engaged after three years of dating, took their two children to pick out a pumpkin on Sunday and looked every inch the happy family as they posed together.

But Alessandra's rep came forward to insist the couple of eight years are 'happily still together.'

'It's not true,' the supermodel's rep confirmed to Us Weekly Thursday.