Any kind of nudity from Musicians, Supermodels or Sportswomen in Movies
It could be any movie in any language

I suppose a loose association to musician is a singer and in the respect Madonna's done her share of nudity. As for supermodels we have Elle Mcpherson (Full Frontal) in "Sirens" and Cindy Crawford (Topless) in "Fair Game".

Kacxan

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Nudity not only expected, but required

The late lovely Laura Brannigan bared her breasts in a movie called "Backstage"

I'm sure Cindy Crawford's brief and poorly-lit breast exposure in "Fair Game" qualifies.

Elle Macpherson in "Sirens"

Does Madonna qualify as a musician? If so add "Body of Evidence", "A Certain Sacrifice" and "Dangerous Game"

Singer Rita Coolidge in "Pat Garrett and Billy the Kid"

Jerry Hall is briefly topless in "Willie and Phil"

Oops sorry. Post overlapped with previous.

Patrice Donnelly in "Personal Best(1982)" was a real olympic athlete (one the 3rd ranked Pentathelete in the world).
"Olympia - Fest der Völker - Erster Film von den olympischen Spielen Berlin 1936" parts 1 and 2 featured german olympic athletes nude.

Jessica Simpson showed some butt cheeks in "Dukes of Hazzard (2005)"

Courtney Love in "People vs. Larry Flynt, The (1996)"

Carol Alt(supermodel)- topless in Deadly Past(1988), and Family Matters(1983).

Bijou Phillips(model-singer)- Topless in Black + White (2000) Topless+ full frontal in Bully (2001)- ? inHavoc (2004).

Paulina Porizkova (supermodel)- nip slip in Her Alibi(1989). Topless in Thursday (1998) and Knots (2004)

Rebecca Romijn-(Stamos) (supermodel)- Topless in Rollerball(2001), Topless and Full Frontal in Femme Fatale (2002), topless in Godsend (2004).

Milla Jovovich (model-singer-musician)- topless in Chaplin (1992), The Fifth Element (1997), He Got Game (1998), Topless and Full frontal in Resident Evil (2002) and No Good Deed (2002), and topless in Resident Evil: Apocalypse(2004).

Cybill Shepherd(model)- Topless and bare butt in The Last Picture Show (1971).

Vitamin C(Colleen Fitzpatrick) Singer- Topless in Dracula 2000 (2000).

Vanity(Denise Mathews)- Singer- Topless in Tanya's Island (1980), 52 Pick Up (1986), Never Too Young to Die (1986), and Action Jackson (1988).

Nicole Appleton+ Natalie Appleton (singers-All Saints)- Both topless in Honest (2000).

Appolonia (singer)- Topless in Amor Ciego (1980), Purple Rain (1984), and Black Magic Woman (1991).

Jamie(James)King(model)- Topless in Happy Campers (2000) and Sin City (2005).

Lori Singer (model-classical cello player)-Topless in Trouble in Mind(1986), Summer Heat (1987), Made in U.S.A.(1988), Sunset Grill (1993), topless + full frontal in Short Cuts (1993), topless in The Last Ride (1994).

The following were former models who appeared nude in films, but I'm not sure they qualify as supermodels:

Elizabeth Hurley
Charlize Theron
Uma Thurman
Cameron Diaz
Kelly Preston
Jessica Lange
Kim Bassinger

Iman (supermodel)-brief left breast in Exit to Eden (1994).

Summer Altice (model-high school + college volleyball player)- Topless in Chromiumblue.com (2003).

Deborah Harry (lead singer of Blondie)- Topless in Videodrome(1983).

Toni Basil (singer "Mickey")- Full frontal in Easy Rider (1969) and topless in Greaser's Palace (1972).

Barbi Benton (country singer)- Topless in Hospital Massacre (1981) and Deathstalker (1984).

Julie Brown (novelty singer-"Homecoming Queen's Got a Gun")- Topless in Bloody Birthday (1981).

Kylie Minogue (singer)- Topless in The Delinquents (1989).

Laetitia Casta (supermodel)- Full frontal in Gitano (2000) and Full frontal and topless in La Bicyclette Blueue (2000).

Barbara Carrera (supermodel)- Topless in Embryo (1976), Wild Geese II (1985), Point of Impact (1993) and Tryst (1994). Full frontal in I, the Jury (1982).

Irene Cara (singer)- Topless in Fame (1980) and full frontal and topless in Certain Fury (1985).

She's not everyone's first choice to see nude, but singer kd lang surprisingly appeared full-frontal in Salmonberries (1991).

"Ready To Wear (1994).
Ute Lemper--Singer, supermodel
Georgianna Robertson--supermodel
Tracey Ullman--singer

Joanie Laurer (aka "Chynna")--athlete
1 Night In China 2004
Playboy: Joanie Laurer - Nude Wrestling Superstar 2002
Frank McKlusky, C.I. 2002

Julie Andrews--singer
"Duet for One 1986"
"S.O.B. 1981"
"Darling Lili 1970"

Marisa Berenson--supermodel
"Tête dans le sac 1984"
"S.O.B. 1981"
"Sex on the Run 1977"
"Barry Lyndon 1975"

Lauren Hutton--supermodel
"Lassiter 1984"
"Hécate 1981"
"American Gigolo 1980"
"Welcome to L.A. 1977"
"Permette? Rocco Papaleo 1971"
"Little Fauss and Big Halsy 1970"
"Pieces of Dreams 1970"

Jennifer O'Neill--supermodel
"The Masters (1975)"

"Gold Bird (2002)"--olympic gymnasts "Ingeri Europeni (Euro Angels)"
Lavinia Milosovici
Claudia Presecan
Corina Ungureanu


Is she the only porn star to have a #1 record?
Andrea True recorded "More, More, More" was in a whole railroad car full of porno films.

Danille Brisebois (singer)- Topless in Big Bad Mama II (1987) + Kill Crazy (1990).

Elizabeth Daily (singer)-Topless + full frontal in Street Music (1981), topless in Valley Girl (1983).

Weny O. Williams (lead singer of The Plasmatics)- Full Frontal in Candy Goes to Hollywood(1979), Topless + full frontal in Reform School Girls(1986).

Vanessa Paradis had a smash hit with Joe le Taxi, and was later full-frontal in Élisa (1995) and Noce blanche (1989).

Toyah Willcox has had a string of hits since 1978, and was full-frontal (barely) in The Ebony Tower (1984) and topless in The Tempest (1979).

Karina Lombard (model) full frontal in Wide Sargasso Sea and topless in The L Word.
Kate Moss (supermodel) brief breast in Inferno.

Maureen O'Sullivan's body double in Tarzan and His Mate was said to be Olympic gold medalist Josephine McKim.

Janet Jackson(singer): Superbowl XXXVIII 2004
Janet Jackson: Live in Hawaii 2002
Anita Pallenberg (supermodel): Performance (1970)

Lynda Carter (Released a solo album entitled 'Portrait' in May 1978. Also, athlete "Battle of the Network Stars"): "Bobbie Jo and the Outlaw (1976)"