By Bianca London

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A dazzling white smile is the prerequisite requirement before any celebrity can make it to the red carpet, they don't call it a Hollywood smile for nothing.

Cheryl Cole once reigned as Queen of the pearly whites, but it has been revealed that not only has Tulisa Contostavlos successfully replaced Cheryl as a judge on The X Factor but she has also knocked her off the top spot for the most wanted celebrity smile.

Cheryl's warm smile won over the nation's hearts and in the past she has been voted to have the most envied ivories. However since Tulisa had her smile transformed with veeners at the start of the ITV show, she has knocked Cheryl from the top spot.

Not only has Tulisa pipped Cheryl to the X Factor role but her pearly whites have knocked her off the top spot too

The findings, carried out by Harley Street Clinic LoveLite, may also cause some sibling rivalry, as whilst Pippa Middleton may boast the best bum in Britain, her smile was only rated in tenth place, seven spots down from her sister Kate who sits at third position.

Despite her relationship woes not giving her much reason to smile at the minute, Michelle Keegan should be cheered by the fact her pearly whites also feature highly on the list at number four.

When it comes to the most sought after male smile, it appears Cheryl Cole isn't the only one to have been charmed by Tom Daley; his dazzling teeth make his the celebrity smile men most want to emulate.

Tom's cheeky grin made him one of the faces of the Olympics and this was more than evident when he beamed from ear to ear as he received Bronze for the Men's 10m diving over the weekend.

Michelle Keegan and the Duchess of Cambridge also made the top celebrity smiles list

Like the women's top three, men are also looking to fellow Brits for inspiration, with David Beckham and Mark Wright coming in second and third.

An unlikely Brit to make the list is Russell Brand, whose unkempt appearance was tidied with teeth whitening when he moved to the States.

It seems men pay attention to the Royals too, as Prince Harry's grin made the list at number eight, just behind rapper Professor Green, who has previously spent a reported 12,000 on overhauling his teeth.

However the over-the-top Hollywood smile look is far from popular, as it was found that the smiles people most want to avoid include Chloe Sims, Nicola Roberts and Simon Cowell, which are thought to be too big and too white.

Tom Daley was the boy's top smile with David Beckham in a close second place

Debra Robson-Lawrence co-founder of the LoveLite clinic said: 'The majority of people coming to get the LoveLite White treatment bring pictures of celebs whose smile they want - just like people do at the hairdressers. People want bright white teeth, which at the same time look natural, which is why we're always asked for teeth like Tulisa, Cheryl and Kate

'We always used to get asked for the "Cheryl Smile" but now Tulisa seems to be the one women want.

'Whiteness similar to the Royals was very popular around the time of the Jubilee, and stars from The Only Way Is Essex are always referenced – although the boys from Made in Chelsea are starting to give them a run for their money!'

MOST POPULAR FEMALE SMILES

1. Tulisa Contostavlos
2. Cheryl Cole
3. Kate Middleton
4. Michelle Keegan
5. Jessica Alba
6. Frankie Sandford
7. Selena Gomez
8. Halle Berry
9. Lauren Goodger
10. Pippa Middleton

MOST POPULAR MALE SMILES

1. Tom Daley
2. David Beckham
3. Mark Wright
4. Brad Pitt
5. Joey Essex
6. Will Smith
7. Professor Green
8. Prince Harry
9. Spencer Matthews
10. Russell Brand

Here's what other readers have said. Why not add your thoughts, or debate this issue live on our message boards.

The comments below have not been moderated.

jesus get me in there id be number one my teeth and smile are perfect and i HAVNT had veneers !

Tom Daley has a nice smile but his too front teeth are too big for his mouth. Tulisa's smile isn't that attractive, at least in the photo shown, Cheryl's looks much warmer.

Did you see Tulisa's smile before she had her teeth-to-gum ratio fixed with her dodgy veneers? "Best smile" indeed. At least Tom Daley's teeth are real.

Tom is a cute and hard working young man that deserves the accolades. However, Tulisa is a plain and talentless chav who does not deserve to judge anyone.

Tulisa is trying too hard with that smile because she's looking straight at the camera when Cheryl is a lovely natural smile with cute dimples because she's talking, not posing. I'm sick to death of Tulisa, get her off the X Factor! I'd much rather have Cheryl than her!

I loved Cheryl's smile even before they were fixed. But Tulisa's is nothing special.

Sorry but Tulisa's smile look like dentures.

And they probably all have the same cosmetic dentist, so who cares? I'd rather a non-veneered celebrity won it. OR someone with wonky interesting teeth that is proud they were born with teeth they are not conceited enough to have fixed!

Who compiled the female list? Was it the Institute for the blind? How is it possible Tulisa is in any list other than Britains Luckiest Chavs?

Once again, a completely reliable and representative survey carried out among how many people? The adult population? The world? Thus the completely authentic results. And why do they rank fake teeth? These have all been whitened, fixed, whatever... It should be a ranking of best dentist work, no?

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