What is a wet tee shirt contest?
Wet tee shirt contests are like any other beauty contest shows, really only it's a lot more naughty! This is a ladies only contest resembling the 'wet boxer short' contests for men. The women wear tee shirts of light colour (generally white) without bras inside. Thus, when water is sprayed on them (the 'wet' part comes in here) the tees becomes translucent or transparent. Since erect nipples are a sign of arousal, therefore the water sprayed on the participating girls is often cold to bring about such an effect. Though such contests are eponymous beauty contests, they often transform from their original format into a form of strip tease or erotic dancing. The purpose of such shows is to induce sexual arousal among the spectators. Many women often take off their clothing appearing completely naked or semi nude to add to the effect. They often also make suggestive gestures like kissing and touching other participants.
 
Where do such contests take place?
Such contest can take place anywhere from the friendly neighbourhood pubs to (believe it or not!) the cockpit of an aeroplane. The last mentioned incident became the source of a huge controversy. However, such contests are not illegal and can take place anywhere with willing participants and spectators. These contests are often filmed and distributed through the Internet or using MMS in cellular phones. So you can always watch through other media even if you are not present. There is no such option for the ambitious ladies who want to participate.
 
History: How did it all start?
It is generally believed that wet tee shirts became popular after Jacqueline Bisset's appearance in the film The Deep. In this 1977 movie, she is seen swimming in a white tee shirt and resurfacing in her transparent and revealing apparel. There is another claimant however. The notorious magazine Playboy supposedly published photographs of participants in a wet tee shirt contest, which was a promotional gimmick for the K2 ski tour in 1969.
 
How to win it?
It must be remembered that taking part in such sexually explicit or daring or whichever way you choose to label it, is not everyone's cup of tea. It is not for women who are shy and/or feel discomfited by strangers staring at their bodies. Many women as well, as men feel outraged by such contest and hold them unethical and immoral. Since the purpose of such contest is to attract attention to the bodies of the participants, anybody feeling uncomfortable should not take part. You are after all judged by your capacity to arouse and titillate the watching audience. It is because of this that women strip completely or make sensual gestures. If you have no problem with attracting attention to your body and are willing to expose, then this should not be a problem for you. In fact for daring, sexy ladies winning a wet tee shirt contest is merely cakewalk!

Wikipedia about Jacqueline Bisset's career (How a TV-actor made the beach holidays fun)
In 1967, Bisset was cast in the movie Two for the Road. Next, she participated in the James Bond satire, Casino Royale (1967), as Miss Goodthighs. In 1968, Mia Farrow dropped out of the movie The Detective (1968), and the role went to Bisset. That same year, she was cast opposite Steve McQueen in Bullitt, and appeared in the 1970 disaster film Airport.

In 1973, she appeared in François Truffaut's Day for Night, where she earned the respect of European critics and moviegoers as a serious actress. She is the main character in Luigi Comencini's La donna della domenica in 1975. In 1977, Bisset made strides towards becoming a better-known entertainer in America with her movie The Deep (1977), co-starring Robert Shaw, where swimming underwater wearing nothing under her T-shirt helped make the film a box office success, leading the producer Jon Peters to say, "That T-shirt made me a rich man,"[5] and led many to credit her with popularizing the wet T-shirt contest. At the time, Newsweek declared her "the most beautiful film actress of all time." About that time, a small Dutch-produced[citation needed] film Bisset had made some years earlier was re-released in the United States under the title Secrets. That movie featured the only extensive nude scenes of Bisset's career and the producers cashed in on her fame.

Jaqueline Bisset at the premiere of Bette Midler's movie The Rose, 1979By 1978, she was a household name. She earned her first Golden Globe nomination for the comedy Who Is Killing the Great Chefs of Europe? Soon thereafter, she played in the movies Rich and Famous (1981) with Candice Bergen, and Under the Volcano with Albert Finney (1984), for which she earned her a second Golden Globe nomination. In 1996, she was nominated for a César Award, for her role in La Cérémonie. Bisset has worked with such directors as François Truffaut, John Huston, George Cukor, and Roman Polanski. Several of her movies are French or Italian productions.

Bisset has appeared in made-for-TV movies, especially during the past 10 years. One of her later TV movies, in 2003, was America's Prince: The John F. Kennedy Jr. Story, in which she portrayed Jacqueline Bouvier Kennedy Onassis. Bisset's most recent television work was a recurring role as the mysterious James, during the fourth season of the FX series Nip/Tuck.

She starred in the lead role of Boaz Yakin's Death in Love which premiered at the 2008 Sundance Film Festival.