▲This may also be a surprise, but apparently Kutcher's lips are one of the most desirable for men.

▲The singer's lips are reportedly one of the most surgically requested.

▲ScarJo has often been compared to the iconic Marilyn Monroe, and her lips are one of the most requested in doctors' offices, CBS reports.

▲The actress' lips have been a hot commodity for years, long before lip fillers became popular. Many clinics say her full, defined lips remain a huge inspiration for patients.

▲The fullness of Mendes' lip is reportedly often requested, as it adds vibrance and youth to other facial features.

▲This may come as a surprise, but J-Law is also leading the lip game. Women looking for a more natural, realistic lip look to this star, Beauty Fix Med Spa reports.

▲Bey is one of the top requested lip augmentations due to the natural, yet full appearance.

▲The Kylie Jenner pout (after she had lip fillers put in) has been one of the most highly requested procedures for patients in recent years.

▲Her nose is already one of the most surgically requested, but RiRi's lips have also made history, particularly as Fenty's greatest model.

▲Women love the star's perfect pout.

▲They're desirable as they are, but her famed lip quiver on 'Scandal' has become a star of its own.

▲If you look up "bee-stung lips," you'll just find a photo of this stunning model.

▲A drop-dead gorgeous model with one of the most voluptuous pouts in town!

▲More people would celebrate the English actress for her acting chops if we weren't all distracted by her mouth!

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When the singer entered the scene, rumors about surgery abounded, but either way, that puffy pout has been inextricably linked to her moody melodies.

▲Her talent and hard work made her career, but those perfectly shaped lips landed her People’s Most Beautiful crown.

▲Beyond the perfect size and shape, the supermodel's lips really shine when she's about to strike!

▲The best part about Seyfried's perfect pout is that she knows how to dress it in the best colors.

▲The winner of Miss World 2000, actress Priyanka Chopra has mind-boggling lips, on which she reportedly only uses lip balm.

▲"Menjections" are what men's minimally-invasive lip procedures are reportedly being called, and Tatum has been a top request for many years now.

▲For the women who weren't fortunate enough to have inherited Steven Tyler's lips, many have gone to the surgeon.

▲The brilliant British actress always has impeccable makeup to highlight her best features (all of them).

▲Styles has one of the most surgically requested lips among male patients, reportedly due to the little lift on the corners which resemble a constant smirk.

▲A record number of requests come in for Superman’s lips, apparently due to the macho strength of his lower lip.

▲The actress has a tattoo of Marilyn Monroe and a pout to match.

▲Hathaway's natural wide smile and big lips are just a few reasons why she'll be remembered.

▲It only makes sense that one of the Sexiest Men Alive has a sexy wife to match.

▲Of course, the blonde bombshell’s legacy lives on in Hollywood. She popularized the bold red pout and always left us wanting more.

▲Naturally, Pitt's perfect lips are also one of the most surgically requested.

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What part of Kim K isn't going down in history for being sought-after?

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In our image-based society, beauty often focuses around a well-formed mouth. Lips have become increasingly popular, with icons including Marilyn Monroe, Angelina Jolie, and more recently Kylie Jenner. What's more, surgical procedures focused on lips have really become trendy.

But whether stars have inspired lip lifts or simply captured hearts, many famous mouths have been marked down in history. Click through to see some of the most popular pouts in fashion, film, and beyond.