Just days after stepping out in public with stunning beauty queen Vivian Burkhardt, Formula 1 ace Lewis Hamilton appears to have made a U-turn - off the track.

The race ace, seems to be at the centre of a love triangle – after being seen with Miss Grenada Vivian in Cannes last week.

But then he was reportedly spotted kissing and cuddling stunning Pussycat Doll front woman Nicole Scherzinger as they celebrated his historic win at the Monaco Grand Prix.

U-turn: Race ace celebrated his stunning win at the Monaco Grand Prix with Pussycat Doll - but is he with her, or beauty queen Vivian Burkhadt?

In what may come as a shock to the former Miss World contestant, who was the talk of the town after she accompanied the Formula One star to the Cannes Film Festival, Nicole has said she and Lewis are an item.

The sexy singer was seen on the grid, alongside his father Anthony at the Monaco race which attracted a host of celebrities including Sean 'Diddy' Combs, U2 guitarist The Edge and Naomi Campbell.

And after winning the Monaco Grand Prix, Lewis partied with Pussycat Doll Nicole and according to friends she has confirmed that they are indeed an item.

Date: Beauty queen Vivian Burkhadt with Lewis at a film premiere in Cannes last week. His relationship with Nicole may come as a shock to her

A source told the Daily Mirror that Nicole said: 'We've been seeing each other on and off for three months. He was amazing today.'

The American singer flew in after Lewis invited her to the pit lane to watch the race which he described as the best of his life.

The F1 star Lewis, 23, and Nicole were then said to have been seen kissing and cuddling in Monaco's Amber lounge while celebrating Sunday's victory.

But a source said: 'Lewis and Nicole spent time with his family to celebrate, then snuck off to the Amber lounge.

'Lewis only had eyes for Nicole - he couldn't keep his hands off her. They were kissing as if no one else was watching.'

Special guest: Hamilton invited Nicole to join him in the pit lane before the start the F1 Grand Prix in Monte Carlo,

Enlarge 

Celebrity friends: Sean 'Diddy' Combs, and Nicole pose with Hamilton's brother Nick

Earlier, the race ace introduced Nicole to his family, including father Anthony and brother Nicolas.

Nicole and Lewis were first linked after meeting at the MTV Awards in Munich last November.

But last week, Lewis was seen with stunning beauty queen Vivian who was his guest at the A-list premiere for Indiana Jones And The Kingdom Of The Crystal Skull.

Her mother Valerie said the pair first got together over dinner back in February and have been writing a letter a week to each other since.

Valerie, who lives in Grenada, said: 'When he was out here in February he invited her out for a meal, just the two of them. They got to know each other and became close.

'They have been writing letters to each other ever since. Then he invited her out for the Cannes Festival.'

And she said the couple got on so well together in Cannes that they have already arranged to get together again in London next month.

Whether Vivian will be keeping her date with Lewis remains to be seen.