most people are more evasive. They may try to downplay the amount (Jenny McCarthy says she's 'team Botox' but uses 'very little') it or say that they 'tried' it at some point in the distant past.
Nicole Kidman says she's back to being 'completely natural' after trying Botox. Jennifer Aniston said that plastic surgery is 'a slippery slope' but admitted to being 'obsessed' with laser treatment.
Aging gracefully: Angelina Jolie (left), Megan Fox (center) and Jennifer Lopez have all stated publicly that the have never had plastic surgery.
According to the American Society for Aesthetic Plastic Surgery, there were more than 8.5million cosmetic minimally-invasive procedures in 2012. Nonsurgical procedures made up 83per cent of the total. So what else haven't celebrities had done?
Injectables are still the most popular treatment. Proteins like Botox, Dysport and Xeomin paralyze muscles in the face to relax existing wrinkles and help prevent new ones from forming. They are often used in the frown lines, horizontal lines across the forehead, and crows feet - but can also be injected around the lips, the chin, and tip of the eyebrows to lift the brow.
As with many other procedures, the injector's skill level is crucial to achieving a natural look. When too much product is pumped into the forehead, the eyebrows can raise in a permanently startled, deer-caught-in-headlights expression - and sometimes the forehead doesn't move at all.
Lip service: Lisa Rinna (left) has fought a very public battle with her lip injections and calls herself a 'pioneer', while Pamela Anderson (right) has appeared in public with a noticeably fuller pout.
Pillow talk: Madonna (left) and former French first lady Carla Bruni (right) have both appeared in public with suspiciously fuller faces.As we age, our faces get thinner as hyaluronic acid, the sugar molecule that holds water in the skin, starts to diminish. But fillers like Juvederm, Restylane, Belotero and Perlane can fill in laugh lines and crows feet, replace volume in cheeks, plump lips and even be used to sculpt the chin with non-permanent 'chinplants'.
'I think that the line is when you go under the knife. The goal is to look like you haven't had any work done'
Some take it a step further and go for a liquid facelift, a general term that usually involves a combination of fillers and Botox and sometimes Sculptra - a longer-lasting poly-L-lactic acid that stimulates the body to produce its own collagen - to shape the face. There is virtually no downtime but, unlike with a surgical facelift, the fillers will eventually need to be topped up.
Injecting too many fillers can lead to the dreaded 'pillow face', a phenomenon that was the hot topic of conversation when the British Association of Aesthetic Plastic Surgeons met in 2011.
'The hallmark of overdone fillers is overfilled nasiolabial folds and overfilled cheeks, so that certain parts of their face don't match,' says Dr Rivkin. 'A 50-year-old woman with huge chipmunk cheeks? Give me a break.'
Fountain of youth? Both Kate Beckinsale (left) and Victoria Beckham (right) have stayed silent about surgery but manage to look better every year .Then there are the laser treatments, which for many celebrities are almost as common as waxing appointments. Lasers like the Aurora, Fraxel, IPL and Ultrapulse can tighten skin while treating redness, sun damage and fine lines - and also stimulate new collagen growth. THE TOP FIVE NON-SURGICAL COSMETIC PROCEDURES
Botox
Hyaluronic acid
Laser hair removal
Microdermabrasion
Chemical peel
Chemical peels are also making a comeback. A solution is applied, and the old skin flakes off taking brown spots, wrinkles, and acne scars with it.
Peels can treat deeper sun damage than most lasers, and despite their slightly scary reputation some doctors feel that they can be safer than laser treatments for darker skin tones.
Those who want a nose job without the pain and obvious bandages can also now opt for the nonsurgical version: The '15-minute nose job' involves injecting tiny amounts of fillers like Radiesse or Artefill and can lift and straighten the tip of the nose, camouflage bumps or correct a deviated septum.
Below the neck, lunchtime lipo is also huge. CoolSculpt freezes localized fat cells so that they die, while Thermage uses radiofrequency, heat and light to shrink fat them.
Like many of us, celebrities often give another safe answer: They claim that they won't rule out treatments 'in the future'. Or, in the words of Heidi Klum, 'ask me again when I'm sixty-five'.