Adele, Angelina Jolie, Rihanna and more celebs who defined beauty in 2011.

Superdrug Britain's second-largest beauty and health retailer, commissioned a study to look for 2011's beauty icons. The result was this fascinating list of stunning women.

20. Scarlett Johansson

The sexy Iron Man 2 actress may have courted controversy with her nude pictures that surfaced recently but that obviously hasn't stopped men (and women) from lusting after Scarlett Johansson!

The sexy British actress has had a fantastic year behind her with a powerhouse performance in A Dangerous Method.

2012 looks just as promising for Keira Knightley as she prepares to play the lead role in the filmed adaptation of Anna Karenina.

The super-sexy mum of god-knows-how many, Angelina Jolie came 18th in the list of 2011's beauty icons.

The English singer, songwriter and actress Pixie Lott started 2010 by being named as one of the year's Faces to Watch by Billboard magazine. She ended 2011 by being 17 in the list of the top 20 beauty icons. Not bad, we'd say.

All set to strike a pose for the Vogue cover this spring, singer-songwriter Adele is slowly but surely becoming a style icon for non-size zero women across the world.

Adele was a new entrant on this list.

The sexy lead singer of Pussycat Dolls and an X Factor judge, Nicole Scherzinger has had something of an eventful year.

After having broken up with Formula 1 driver Lewis Hamilton, it was reported in July 2011 that she was back with him. Barely months later, on October 21 it was learnt that they had broken up again.

Scherzinger came 15 in the list of top 20 beauty icons of 2011.

Yet another newcomer on the list and another hottie who's had a seesaw of a year on the personal front.

The sexy soprano Katherine Jenkins got engaged and broke up all in a matter of 2011 was also voted as one of the top 20 beauty icons of 2011.

Also making an appearance on the list was reality TV star and presenter Amy Childs.

"While the majority of ladies in the list are natural beauties, we also see the TOWIE effect with Amy Childs appearing on the list for the first time with her Essex tan, hair extensions, and false nails," Sara Wolverson, Director of Beauty at Superdrug was quoted as saying in the Daily Mail.

The maverick singer and performer finished 12th in the list of beauty icons for her outrageous sense of style that has become a huge hit making Lady Gaga also one of the most sought-after pop stars in the business today.
11. Kelly Rowland

Destiny's Child founder member and singer-actress Kelly Rowland was voted at number 11 in the list of the top 20 beauty icons of 2011.

It's sort of hard to imagine a list of beauty icons without Victoria Beckham, isn't it?

The former Spice Girl who also recently appeared on the list of the most stylish celebrities for women over 50, Victoria Beckham was 10th in this list.

The sexy singer-songwriter and actress Katy Perry who's recently split from her husband Russell Brand made it to the list too. She was 'cited for her quirky style', the Daily Mail reports.

She's blossomed from a gawky young girl to a stunning teenager with an ease that should serve as a lesson to every single child actor in showbiz.

Emma Watson of the pixie haircut fame came eighth in the list of the top beauty icons.

The sexy songstress and the newest mother-to-be Beyonce appeared on this list for the first time. She finished seventh.

Tulisa Contostavlos, the singer-songwriter and that sexy celebrity X Factor judge of Greek-Irish descent (how does one even manage that, whew!) came six in the list.

Television presenter Holly Willoughby who recently sported a sexy new curly hairstyle as she modelled her new Spring/Summer 2012 collection finished five in the beauty icons of 2011 list.

Willoughby, a mother-of-two and This Morning television presenter who was replaced by Christine Bleakley on Dancing on Ice is now looking forward to hosting a new talent show -- The Voice -- which judges people only by their voice rather than their looks.

If there was one girl who had a really eventful, busy and an envious year behind her, it undoubtedly was Rihanna.

She completed a gruelling six-month tour gig tour around the world, lent her shoulder to Katy Perry who recently divorced her husband and said goodbye to 2011 in a sexy two-piece bikini in Barbados.

Rihanna came number four in the list of beauty icons for 2011.

She may have moved on from X Factor America and has been keeping something of a low profile but that didn't stop Cheryl Cole from being voted as one of the top three beauty icons of 2011.

The singer-actress-dancer-model had topped the very same list last year.

The bottom. Need we say more? Pippa Middleton was number two in the list of beauty icons for 2011.

It's kinda difficult to not top a list of beauty icons when you're married to the prince in the wedding of the century isn't it?

In all fairness though Kate Middleton had been grooming herself rather well much before her marriage to Prince William.

The Duchess of Cambridge, with her impeccable style and yet an unmissable a common touch topped the list of the top 20 style icons of 2011.