It’s a well known fact that to cut it in Hollywood you need a megawatt smile. But as celebrities often play their cards close to their chest when it comes to cosmetic procedures, it requires some super sleuthing and a couple of ‘before’ photos to work out whether in fact mother nature blessed them with great genes, or if they have had a helping hand in pursuit of the perfect pearly whites.

Here we take a look at some famous faces who have spent more than their fair share of hours in the dentist’s chair…

Demi Moore
As well as undergoing a rumoured $ 365,000 worth of plastic surgery over the years, Demi has completed the Hollywood package with a smile makeover. Her teeth have possibly been capped, a process which involves filing the teeth down and using dental cement to fit individual false teeth, usually made from porcelain, in their place. This has resulted in an even, bright white smile, a far cry from her General Hospital days.

Hilary Duff
Disney alumni Hilary famously had badly proportioned porcelain veneers fitted in 2005 resulting in a smile that was much parodied and likened to that of a horse. In 2008, her dental misdemeanours were corrected as her veneers, which are porcelain or ceramic coverings fixed to the front of the teeth, were reshaped and re-contoured. Hilary’s teeth are now a shining example of the perfect star smile.

Kirsten Dunst
Although once claiming to ‘love’ the uniqueness of her famous fangs, in more recent photos it appears that Kirsten has traded them for the textbook Hollywood grin. So are Kirsten’s new straight white teeth down to some clever airbrushing, or has she conformed to Tinseltown pressure and booked in with an orthodontist?

Other celebs rumoured to have undergone orthodontic treatment include Nicole Kidman, Miley Cyrus, Katherine Heigl and Katie Holmes.

And it’s not just the girls who are in on the act; take a look at some of Hollywood’s leading men who have invested in their smiles:

Tom Cruise
Famously, in 2002, the Top Gun star wore fixed ceramic braces to realign his bite. No longer just the domain of kids and teens, Tom’s braces have led to an increase in the number of adults, particularly men, undergoing treatment to fix their own imperfections and achieve the perfect smile.

Zac Efron
When High School Musical heart-throb Zac Efron traded his gappy front teeth to a full white smile, it marked his ambition to be taken more seriously and move from Disney territory to more grown up movies. So how did he achieve his new smile? It is possible that the gap in Zac’s front teeth closed naturally over time, or, that he had a helping hand in the form of veneers or Invisalign braces. Invisalign are clear, removable aligners, often used as an alternative to traditional fixed braces.

Ben Affleck too has undergone a smile overhaul, Michael Douglas had his teeth revamped back in the 80s and even Nicolas Cage appears to have undergone whitening procedures to add a little extra star quality to his smile.

So, watch out when you next see a big Hollywood star as they just have a different smile altogether!

After staying away from the Hollywood limelight for two years, Kirsten Dunst made a red carpet comeback on Friday. She attended the Tribeca Film Festival in New York for the premiere of the movie, Between The Lines.

The 27-year-old actress made her directorial debut this year with her short film, Bastard. The film screened with six other short films in the Between the Lines shorts program.

It’s good to see Kirsten with a more positive attitude after her bout with depression. She entered the Cirque Lodge, a rehab centre in Utah last year after attempting to conquer the condition on her own for six months.

“I didn’t go to Cirque Lodge for alcohol abuse or drug abuse,” she told OK! magazine. “I went there for depression… I was struggling, and I had the opportunity to go somewhere and take care of myself. I was fortunate to have the resources to do it.”

The 34-year-old actor who played the lead in the past three Spider-Man flicks is hanging the famous Spidey suit for good.

Take a bow, Tobey.

According to Daily Mail, it isn’t just Tobey who’s quitting. Director Sam Raimi and Kirsten Dunst (who played Mary Jane Watson, Spider-Man’s love interest) have pulled out of the upcoming third superhero sequel. Although both Tobey and Sam are citing script problems and financial conditions as their reason for quitting, they insist have no hard feelings for the Spidey series.

“I am so proud of what we accomplished with the Spider-Man franchise over the last decade,” Tobey said. “Beyond the films themselves I have formed some deep and lasting friendships. I am excited to see the next chapter unfold in this incredible story.”

Marvel Comics and Sony Pictures have new plans for Spider-Man 4, anyway. The movie, which will be released in 2012, will show Peter Parker in high school as he deals with teenage issues and his newfound super powers.

I can’t wait to see whom they’ll cast for the prequel. I pray that the execs keep their fingers away from the Twilight and Disney jars.

Mary Jane Watson will be back in the 4th installment of the Spiderman series and will still be played by Kirsten Dunst. I don't have a particular liking for Kirsten Dunst but she's been there from the start and the movies have been successful, so why not?

Kirsten Dunst has just checked into Cirque Lodge Treatment Center — yes, the same place where Lindsay Lohan, Eva Mendes and god knows what other HOllywood star went to in the last 6 months.

Though Kirsten has been known to enjoy her parties, her behavior at the recent Sun Dance Festival was “unusually erratic.” Her friends say that she was just being her typical “carefree, party girl” self, but our Spidey Sense tells us that there’s something else going on. Especialy since, the day after the party, Kirsten was feeling “too unwell” to attend her own Glamour Magazine party.

While out Thursday night with pals Jamie-Lynn Sigler & Kirsten Dunst, Mischa Barton partied a little too hard.

The trio were slamming back drinks at New York City hotspot The Anchor when Barton apparently pulled back a drink & then pushed back some vomit on the patio.

Now, most celebs would just go ahead & call that a night, but not good old Mischa.  Barton marched back into the club, head held high, and started the party all over again.  My, what a trooper.

So, is Mischa trying to hail a cab here or signaling her own kind on Mars to come back & pick her ass up?  You tell me.

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“Boys frustrate me. I hate all their indirect messages, I hate game playing. Do you like me or don’t you? Just tell me so I can get over you.”

~Kirsten Dunst

Well, you have to narrow down the hunt somehow & it looks like actress Kirsten Dunst has found the key to dating happiness- only dating fellas whose names start with the letter A.  It makes sense, in a Kirsten Dunst kind of way, right?

Just on Thursday night she was spotted with  Adrian Grenier at 10:30pm at the hip restaurant Freeman’s.  Dunst & Grenier were reported to be flirting, but not groping (just yet anyway).  By 11:30pm Kirsten was seen frenching SNL’s Andy Samberg at a Fashion Week kickoff party. 

And if that wasn’t enough to support Dunst’s A-list, the dating queen was recently spotted with Adam Brody.  My, does that girl get around!  So, you tell me, what are your dating requirements?  I’m going with your name has to start with the letter Q.  You know, to make that dating pot a little smaller. 

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