The Fuel Girls with their fire and pyro performance on stage in London on September 20, 2025. The Big London Tattoo Show, the UK's largest tattoo convention, is in full swing at ExCeL London, transforming the venue into a bold celebration of tattoo artistry and alternative culture. (Phoot by Imageplotter/Alamy Live News)

A young YPJ recruit (in pink) arrives to the training base for her first day in training near Derek City, Syria. The YPJ schedule is demanding and requires discipline – new soldiers in training get about 6 hours of sleep a night and wake up at 4 AM to begin exercising; afterwards, their day consists of a full schedule of drills and classroom lessons. Before joining the YPJ many of the girls had never participated in physical activity or sports before. (Photo by Erin Trieb/NBC News)

A Kurdish girl celebrates Newroz Day, a festival marking spring and the new year, in Akra, Iraq March 20, 2016. Nowruz is the name of the Iranian New Year also referred to as Persian New Year which is celebrated worldwide by Iranian peoples, along with some other ethno-linguistic groups. Nowruz is the day of the vernal equinox, and marks the beginning of spring in the Northern Hemisphere. It usually occurs on March 21 or the previous/following day, depending on where it is observed. Although having Persian and religious Zoroastrian origins, Nowruz has been celebrated by people from diverse ethno-linguistic communities for thousands of years. (Photo by Ari Jalal/Reuters)

Girls in swimsuits participate in the Grelka Fest at the ski resort Sheregesh in Tashtagolsky District of Kemerovo Oblast, Russia on April 15, 2018. Skiers and snowboarders from around the world marked the end of the 2017-18 winter season. Wearing bikinis and bathing shorts a total of 1,525 claimed a new Russian record for the daring downhill escapade – in a temperature of around 5ºC. In fact, more have taken part in this GrelkaFest event in the past, but not during an official record attempt. (Photo by Kemerovo Online/The Siberian Times)

Fuse TV VJ's Marianela and Juliya attend the store opening of “Nigo's A Bathing Ape” with Pharrell Williams January 11, 2005 in New York City. (Photo by Paul Hawthorne/Getty Images)

A girl rides on a train as she takes part in the first edition of the No Pants Subway Ride in Bucharest, Romania, Sunday, January 11, 2015. The No Pants Subway Ride is an annual which was started in 2002 by Improv Everywhere in New York, the goal is for riders to get on the subway train dressed in normal winter clothes without pants and keep a straight face. (Photo by Vadim Ghirda/AP Photo)

Teenage girls are all steamed up these days about straight hair. The steam iron is replacing the huge rollers on which countless teens slept every night to achieve the height and curls fashionable until. The same girls endure having their hair stretched to absolute straightness on the ironing board, and then ironed to keep it that way. Unlike the roller setting, this takes teamwork. Gay Stilley, 14, goes through an ironing session with a couple of her friends at the Stilley Home in Glen Oaks, Queens, New York City on December 23, 1964. With a wary eye, Gay tries to watch the straightening process as one friend stretches her hair with a comb and another does the ironing, in the Stilley kitchen. (Photo by Marty Zimmerman/AP Photo)

Chinese models with animal-themed body paintings pose during a campaign for animal protection at Sanya Color Zoo in Sanya city, south China's Hainan province, 10 January 2016. The girls wearing strapless bras and short pants only were colored with animal-themed paintings such as zebra, cheetah, tiger and peacock. They paraded throughout the newly-opened Sanya Color Zoo and met visitors to take pictures, causing envies from netizens living in north China who are suffering chills. (Photo by Imaginechina/Splash News)