Who was wearing Skims underwear on the Blue Origin space mission?
The two musicians shared an adorable moment in 1973 at a promotional party for the Rolling Stone's album 'Goats Head Soup.' They're pictured at Blenheim Palace in Woodstock, England.
This interesting encounter was immortalized at the after-concert-party that Harry and his brother William hosted to thank those who took part in the "Concert for Diana" at Wembley Stadium in London in 2007.
The British supermodel gets the dance floor started at a party for the film 'Ed Wood' at the Cannes Film Festival in 1995.
The supermodel brought the fun to the Rock 'n' Rule Benefit after-party in New York in 1992.
Yves Saint Laurent and Andy Warhol bookend this fabulous party shot, taken in Paris in 1977.
The famed artist and the Italian actress raise their glasses together at the Americana Hotel party following the premiere of 'The Sound of Music' in 1965, this in New York.
The artist and the model split some dessert at the party for the premiere of the movie 'Trash' in Munich in 1971.
The then-husband and wife wear complementary masks as they arrive at Truman Capote's Black and White Ball in 1966, in New York.
The supermodel doesn't look particularly enthused in her conversation at the London launch party for her autobiography 'Kate: The Kate Moss Book' in 1995.
Elton John seems to be having a rollicking good time with Neil Sedaka and Bernie Taupin in London in 1975.
The actress attends a party at the Cocoanut Grove in Hollywood in 1961, wearing a throat bandage following a tracheotomy.
The stars were both nominated at the Academy Awards in 1970, and they're spotted celebrating at the Awards party together at the Dorothy Chandler Pavilion, in Los Angeles.
The Princess of Wales lets loose in this rare snap taken at the Sony Ericsson WTA Tour's pre-Wimbledon party in London in 2006.
Bobby Brown and Whitney Houston arrive ready for the Vanity Fair Oscar Party at Morton's Restaurant in Los Angeles, circa 2001.
The Rat Pack singers sandwich the sari-clad actress at a party following one of Martin's opening nights in Hollywood, circa 1965.
The musicians are snapped at a special 1974 party to mark Clapton's return to recording and live performance, at the China Garden in Soho, London.
The model and the actress embrace at a launch party in London in 1998.
The actress scratches an itch at Woody Allen's New Year's Eve Party in New York City, this in 1979.
Noel Gallagher of Oasis examines something potentially fun at the after-party for Steve Coogan's show 'The Man Who Thinks He's It' in 1998 in London.
The stylish actress is pictured mingling at a high-class party in San Francisco, circa 1955.
The popular group of stars attend the after-party following the premiere of 'Mickey Blue Eyes' in 1999 in London.
Guest of honor Twiggy dances with Bono, and her boyfriend and manager Justin de Villeneuve also busts a move at this 1967 Beverly Hills shindig.
The icons laugh together at Jones' 42nd birthday party at NYC's Stringfellow's Nightclub in 1990.
American actors, and temporary cowboys, Kirk Douglas and Frank Sinatra laugh together at a party at the Moulin Rouge in Paris in 1959.
The free-spirited folk singer was, of course, spotted barefoot at a 1972 party held at the home of Cass Elliott of the Mamas & The Papas, this in Los Angeles.
Supermodels attending private parties (circa 1992) in New York City—classic!
The American actors and the Brazilian singer attend a Carnival party in Rio de Janeiro, Brazil in 1979.
The Café Royal after-party following David Bowie's Ziggy Stardust retirement concert in London in 1973 was legendary. Pictured from left to right, back row to front row are: unknown drinking man, Angie Bowie, David Bowie, Bianca Jagger, Edgar Broughton, (front) Maureen Starkey, Mick Ronson, Lulu, Jeff Beck, Celia Hammond, and Ringo Starr.
Rare vintage photos of celebrities partying
Today is World Party Day!
CELEBRITY Nostalgia
We're all used to the canned red carpet photos when celebrities work their best angles and photographers repeatedly get the same shots of everyone. But red carpets are a small fraction of stars' time in comparison to their vivid night lives filled with parties and after-parties. It's certainly harder to get paparazzi in to these private events, but in decades past you could count on clever photographers who knew how to capture the moments everyone really wants to see. Click through to see rare photos of celebs at parties.