Question: Which documentary featured cameos by musicians, Go Further or The True Glory?
Context: The True Glory (1945) is a co-production of the US Office of War Information and the British Ministry of Information, documenting the victory on the Western Front, from Normandy to the collapse of the Third Reich. Sri Lanka's Killing Fields was an investigatory documentary about the final weeks of the Sri Lankan Civil War broadcast by the British TV station Channel 4 on 14 June 2011.  Described as one of the most graphic documentaries in British TV history, the documentary featured amateur video from the conflict zone filmed by civilians and Sri Lankan soldiers which depicted "horrific war crimes".  The video filmed by civilians included harrowing scenes during and after intense shelling of civilian targets, including hospitals, by the Sri Lankan military.  The "trophy video" filmed by Sri Lankan soldiers showed disturbing scenes of blindfolded victims being executed and dead bodies of naked women being dragged onto trucks by soldiers as they made lewd remarks about the victims.  The documentary also included interviews with civilians who managed to survive the conflict, United Nations staff based in Sri Lanka during the conflict, human rights organisations and an international law expert.  The documentary was made by ITN Productions and presented by Jon Snow, the main anchor on Channel 4 News. Major Douglas Alexander Zembiec (April 14, 1973 – May 11, 2007), the "Lion of Fallujah" and also referred to as the "Unapologetic Warrior" was an officer in the United States Marine Corps and member of the CIA's Special Activities Division's Ground Branch who was killed in action while serving in Operation Iraqi Freedom.  He is best known for his actions during Operation Vigilant Resolve, which were detailed in the book "No True Glory: A Front-line Account of the Battle of Fallujah" by Bing West and for an article that ran in the Wall Street Journal following his death. Go Further is a 2003 documentary film by Ron Mann starring Woody Harrelson and a group of other environmental activists riding around in a large, bio-fueled bus.  The tour was called the Simple Organic Living Tour and it was produced by cause-related marketers the Spitfire Agency.  The film debuted at the South by Southwest Film Festival in March 2003, and at the Toronto International Film Festival in September 2003, where it was first runner-up for the People's Choice Award.  It was also nominated for a Genie Award for Best Documentary.  The film features cameos by Dave Matthews, Natalie Merchant, Ken Kesey, Bob Weir (of the Grateful Dead), Michael Franti (of Spearhead), Anthony Kiedis (of Red Hot Chili Peppers), Rob Heydon, Medeski Martin & Wood, and The String Cheese Incident. Francine Parker (December 18, 1925 – November 8, 2007) was an American television and film director, who was one of the first female members of the Directors Guild of America.  Parker was best known for her controversial documentary, "F.T.A.", which chronicled the antiwar entertainers tour, Free The Army tour (FTA), during the Vietnam War.  The FTA tour and its documentary featured anti-Vietnam War celebrities Jane Fonda and Donald Sutherland interacting very frankly with American soldiers.  Parker's film, which was released in 1972, was pulled from theaters within weeks of its release due to heavy criticism.  It has been rarely viewed since 1972. Beyond a Joke was a 2009 ITV3 documentary series exploring the social context of classic and contemporary British sitcoms.  The documentary featured clips from the sitcoms and interviews with a variety of celebrities and experts, including John Cleese, Paul Nicholas, Tony Benn, Carla Lane, Jonathan Harvey, Don Warrington, Ian Lavender, Nina Myskow, Andrew Sachs, Edwina Currie and Vanessa Feltz.  It was narrated by Dave Lamb. Starman was a comic book published by DC Comics between 1994 and 2001.  It was created by James Robinson and Tony Harris, starring their creation of Jack Knight, son of the Golden Age Starman.  The comic featured cameos from several established DC characters, such as Batman and Superman, but also had a large ensemble cast made up of established characters and new creations. "N.E. Heart Break" is a 1989 song performed by American R&B quintet New Edition.  The song serves as the fifth and final single from their sixth studio album "Heart Break" (1988).  "N.E. Heart Break" peaked at number 13 on the Hot R&B/Hip-Hop Songs chart.  The music video for the song depicts the group members riding mopeds after finishing their Heart Break tour.  The music video featured cameos from Malcolm Jamal Warner (who also directed the video), Heavy D & The Boyz (The group's labelmate), Shanice Wilson, The Boys, Robert Townsend, and Brooke Payne, who also appeared in the "If It Isn't Love" video.  The version of the song featured in the video is the single version, rather than the one featured on the studio album. "How I Could Just Kill a Man" is the debut single by hip hop group Cypress Hill from their eponymous debut album, "Cypress Hill", and was their first major hit in 1991.  It was released as a double A-side to "The Phuncky Feel One" and the music video featured cameos by A Tribe Called Quest's Q-Tip and Ice Cube, with whom the group would later feud.  It was re-released in 1999 with Spanish lyrics and a new video.  It is featured as the first track on their greatest hits compilation "Greatest Hits From the Bong".  The song was also featured on the 2004 video game "", appearing on the West Coast hip hop station .  It was voted #79 in About.com's Top 100 Rap Songs. MTV Reality Stars is India’s first youth sitcom.  It is a season-based fiction TV dramedy (Drama-Comedy) and satire created by Nikhil Taneja that captures the comedy and chaos in the Showbiz industry.  The series also featured cameos by top Bollywood filmmaker Anurag Kashyap and famous Bollywood actors Arshad Warsi and Anand Tiwari.  The 12-episode first season of the show was aired every Saturday on MTV India at 6.30 pm from 16 March 2013 to 1 June 2013.  The humour and the look and feel of the show were in the space of Bollywood movies Delhi Belly and Pyaar Ka Punchnama.
Answer: Dave Matthews, Natalie Merchant, Ken Kesey, Bob Weir (of the Grateful Dead), Michael Franti (of Spearhead), Anthony Kiedis (of Red Hot Chili Peppers), Rob Heydon, Medeski Martin & Wood, and The String Cheese Incident