Question: 21st AVN Awards  was co-hosted by what American enterpreneur who has been called "The Queen of Porn"

Context articles: 33rd AVN Awards
17th AVN Awards
34th AVN Awards
12th AVN Awards
16th AVN Awards
21st AVN Awards
24th AVN Awards
20th AVN Awards
31st AVN Awards
Jenna Jameson

The 33rd AVN Awards ceremony, presented by Adult Video News (AVN), honored the best pornographic movies and adult entertainment products of 2015 and took place on January 23, 2016 at The Joint in Hard Rock Hotel and Casino, Paradise, Nevada.
 During the ceremony, Adult Video News will present AVN Awards (often referred to as the Oscars of porn ) in 115 categories released from October 1, 2014 to September 30, 2015.
 The ceremony, taped to be televised in the United States by Showtime, was produced by Gary Miller.
 Comedian and actress Kate Quigley co-hosted the show for the first time, joined by adult movie actresses Joanna Angel and Anikka Albrite.
The 17th AVN Awards ceremony, presented by Adult Video News (AVN), took place January 8, 2000 at the Venetian Hotel Grand Ballroom, at Paradise, Nevada, U.S.A.
 During the ceremony, AVN presented AVN Awards (often dubbed the "Academy Awards Of Porn") in 77 categories honoring the best pornographic films released between Oct. 1, 1998 and Sept. 30, 1999.
 The ceremony was produced by Gary Miller and directed by Mark Stone.
 Adult film star Juli Ashton hosted the show.
The 34th AVN Awards, presented by Adult Video News (AVN), honored the best pornographic movies and adult entertainment products of between October 1, 2015 and September 30, 2016 and took place on January 21, 2017 at The Joint in Hard Rock Hotel and Casino, Paradise, Nevada.
 During the ceremony, Adult Video News presented AVN Awards (often referred to as the Oscars of porn ) in 117 categories.
 Webcam star Aspen Rae and reigning AVN Female Performer of the Year Riley Reid co-hosted the ceremony, each for the first time.
 Master of ceremonies was comedian Colin Kane.
The 12th AVN Awards ceremony, organized by Adult Video News (AVN) took place on January 7, 1995, at Bally’s Hotel and Casino, Paradise, Nevada beginning at 7:45 p.m. PST / 10:45 p.m. EST.
 During the ceremony, AVN presented AVN Awards (commonly referred to as the Oscars of porn) in 89 categories honoring the movies released during the period December 1, 1993 to November 30, 1994.
 The ceremony was produced by Gary Miller, Mark Stone and Marco Polo.
 Actor Steven St. Croix hosted the show for the first time, with co-hosts Dyanna Lauren and Tera Heart.
The 16th AVN Awards ceremony, organized by "Adult Video News" (AVN) honored the best of 1998 in pornographic movies and took place on January 9, 1999, at Bally's Las Vegas, Las Vegas, Nevada.
 During the ceremony, AVN presented AVN Awards in 68 categories.
 The ceremony, televised by Playboy TV, was produced by Gary Miller and directed by Mark Stone.
 Comedian Robert Schimmel returned as host and actresses Alisha Klass, Midori and Serenity co-hosted the award show.
 Five weeks earlier in a ceremony held at the Westin Bonaventure in Los Angeles, California, on December 4, 1998, the awards for gay pornographic movies were presented in a new separate ceremony known as the GayVN Awards.
The 21st AVN Awards ceremony, presented by Adult Video News (AVN), took place January 10, 2004 at the Venetian Hotel Grand Ballroom, at Paradise, Nevada, U.S.A.
 During the ceremony, AVN presented AVN Awards in 94 categories honoring the best pornographic films released between Oct. 1, 2002 and Sept. 30, 2003.
 The ceremony, televised in the United States by Playboy TV, was produced and directed by Gary Miller.
 Comedian Jim Norton hosted the show for the first time with adult film star Jenna Jameson in her third stint as co-host.
The 24th AVN Awards ceremony, presented by Adult Video News (AVN), honored the best pornographic films of 2006 and took place January 13, 2007 at the Mandalay Bay Events Center in Paradise, Nevada.
 During the ceremony, Adult Video News presented AVN Awards (commonly referred to as the Oscars of porn)) in 119 categories released during the eligibility period, Oct. 1, 2005 to Sept. 30, 2006.
 The ceremony, televised in the United States by Playboy TV, was produced and directed by Gary Miller.
 Adult film star Jessica Drake hosted for the first time, with comedian Jim Norton, who also co-hosted in 2004.
The 20th AVN Awards ceremony, presented by Adult Video News (AVN), took place January 11, 2003 at the Venetian Hotel Grand Ballroom, at Paradise, Nevada, U.S.A.
 During the ceremony, AVN presented AVN Awards in nearly 90 categories honoring the best pornographic films released between Oct. 1, 2001 and Sept. 30, 2002.
 The ceremony was produced by Gary Miller and directed by Mark Stone.
 Comedian Doug Stanhope co-hosted the show for the first time with adult film star Chloe.
31st AVN Awards was an event during which "Adult Video News" ("AVN") presented its annual AVN Awards to honor the best pornographic movies and adult entertainment products of 2013.
Jenna Jameson (born Jenna Marie Massoli; April 9, 1974) is an American entrepreneur, webcam model and former pornographic film actress, who has been called the world's most famous adult entertainment performer and "The Queen of Porn".