Question: Harvey Milk is an American experimental rock/noise rock band that formed in Athens, Georgia in the early 1990s, one April Fool's Day gig at the 40 Watt in Athens, they performed R.E.M.'s "Reckoning" album from beginning to end, while which American singer, songwriter, musician, film producer, music video director, visual artist, and philanthropist, was in attendance?

full_context: Document 1: Mickey Thomas (singer): John Michael "Mickey" Thomas (born December 3, 1949) is an American rock singer, best known as one of the lead vocalists of Jefferson Starship and Starship.
Document 2: Harvey Milk (band): Harvey Milk is an American experimental rock/noise rock band that formed in Athens, Georgia in the early 1990s. While Harvey Milk invariably draws comparisons to the Melvins, due to their penchant for slow, heavy riffs, the band has touched upon such artists as ZZ Top, Led Zeppelin, Leonard Cohen, and Kiss as influences in their music. They even went so far as to perform a live show consisting of nothing but Hank Williams covers. One April Fool's Day gig at the 40 Watt in Athens, they performed R.E.M.'s "Reckoning" album from beginning to end, while Michael Stipe was in attendance.
Document 3: ZZ Top: ZZ Top is a rock band formed in 1969 in Houston, Texas. The band has, since 1970, consisted of bassist and lead vocalist Dusty Hill, guitarist and lead vocalist Billy Gibbons (the band's leader, main lyricist and musical arranger), and drummer Frank Beard. "As genuine roots musicians, they have few peers," according to former musician, critic and collector Michael "Cub" Koda. "Gibbons is one of America's finest blues guitarists working in the arena rock idiom [...] while Hill and Beard provide the ultimate rhythm section support."
Document 4: Michael Jackson: Michael Joseph Jackson (August 29, 1958 – June 25, 2009) was an American singer, songwriter, and dancer. Dubbed the "King of Pop", he was one of the most popular entertainers in the world, and was the best-selling music artist at the time of his death. Jackson's contributions to music, dance, and fashion along with his publicized personal life made him a global figure in popular culture for over four decades.
Document 5: Murmur (album): Murmur is the debut studio album by the American alternative rock band R.E.M., released on April 12, 1983 by I.R.S. Records. "Murmur" drew critical acclaim upon its release for its unusual sound, defined by lead singer Michael Stipe's cryptic lyrics, guitarist Peter Buck's jangly guitar style, and bass guitarist Mike Mills' melodic basslines.
Document 6: Michael Hutchence: Michael Kelland John Hutchence (22 January 1960 – 22 November 1997) was an Australian musician and actor. He was a founding member, lead singer and lyricist of rock band INXS from 1977 until his death in 1997. He was a member of short-lived pop rock group Max Q and recorded solo material which was released posthumously. He acted in feature films, including "Dogs in Space" (1986), "Frankenstein Unbound" (1990) and "Limp" (1997). According to rock-music historian Ian McFarlane, "Hutchence was the archetypal rock showman. He exuded an overtly sexual, macho cool with his flowing locks, and lithe and exuberant stage movements." Hutchence won the 'Best International Artist' at the 1991 BRIT Awards with INXS winning the related group award.
Document 7: Michael Stipe: John Michael Stipe (born January 4, 1960) is an American singer, songwriter, musician, film producer, music video director, visual artist, and philanthropist. He is best known as the lead singer of the alternative rock band R.E.M. from their formation in 1980 until their dissolution in 2011.
Document 8: Community Trolls: Community Trolls was the group name of a short-lived musical duo between Michael Stipe of R.E.M. and Matthew Sweet. In 1983, they collaborated as part of the Athens, Georgia music scene, writing and recording three songs together. One of the compositions, "Tainted Obligation", was nearly released on a compilation album in 1986, and later appeared on bootlegs; it was released officially in 2002. Another Community Trolls' song, "Six Stock Answers", appeared in an unreleased indie film featuring Stipe, Sweet and some of their friends.
Document 9: Mother's Milk: Mother's Milk is the fourth studio album by American funk rock band Red Hot Chili Peppers, released on August 16, 1989, by EMI Records. After the death of founding guitarist Hillel Slovak and subsequent departure of drummer Jack Irons, vocalist Anthony Kiedis and bassist Flea regrouped with the addition of guitarist John Frusciante and drummer Chad Smith. Frusciante's influence altered the band's sound by placing more emphasis on melody than rhythm, which had dominated the band's previous material. Returning producer Michael Beinhorn favored heavy metal guitar riffs as well as overdubbing that was perceived by Frusciante as excessive, and as a result Beinhorn and Frusciante constantly fought over the album's guitar sound.
Document 10: Umphrey's McGee: Umphrey's McGee is an American jam band originally from South Bend, Indiana. The band's approach shares many elements with groups like Phish and the Grateful Dead such as varying set lists, improvisation, playing two sets per night, and allowing fans to tape concerts, they are much more influenced musically by progressive rock artists such as King Crimson, Yes, Pink Floyd, Frank Zappa, The Mahavishnu Orchestra, and early Genesis, as well as heavy metal bands such as Iron Maiden and Van Halen. The band also identifies The Police, The Beatles, and Led Zeppelin as primary influences. UM experiments with many musical styles, including rock, metal, funk, jazz, blues, electronic, bluegrass, and folk.
Document 11: R.E.M. discography: American alternative rock band R.E.M. released 15 studio albums ranging from 1983 to 2011, three live albums, 14 compilation albums, one remix album, one soundtrack album, 12 video albums, seven extended plays, 63 singles, and 77 music videos. Formed in 1980 by singer Michael Stipe, guitarist Peter Buck, bassist Mike Mills, and drummer Bill Berry, the band was pivotal in the development of the alternative rock genre. Their musical style inspired several other alternative rock bands and musicians, and the band became one of the first alternative rock acts to experience breakthrough commercial success. R.E.M. has sold over 85 million copies of their studio albums worldwide, making them one of the best-selling music artists of all-time.
Document 12: Monster (R.E.M. album): Monster is the ninth studio album by the American alternative rock band R.E.M., released in September 1994 on Warner Bros. Records. Co-produced by the band and Scott Litt and recorded in four different recording studios, "Monster" was an intentional stylistic shift from the group's preceding albums, "Out of Time" (1991) and "Automatic for the People" (1992), consisting of loud, distorted guitar tones and simple song arrangements. Singer Michael Stipe's lyrics on the album dealt with the nature of celebrity, which he sang while assuming various characters.
Document 13: R.E.M.: R.E.M. was an American rock band that formed in Athens, Georgia, in 1980 by lead singer Michael Stipe, guitarist Peter Buck, bassist/backing vocalist Mike Mills, and drummer Bill Berry. One of the first alternative rock bands, R.E.M. was noted for Stipe's particular vocal quality and obscure lyrics, Buck's ringing, arpeggiated guitar style, and Mills' melodic basslines and backing vocals. R.E.M. released its first single—"Radio Free Europe"—in 1981 on the independent record label Hib-Tone. The single was followed by the "Chronic Town" EP in 1982, the band's first release on I.R.S. Records. In 1983, the group released its critically acclaimed debut album, "Murmur", and built its reputation over the next few years through subsequent releases, constant touring, and the support of college radio. Following years of underground success, R.E.M. achieved a mainstream hit in 1987 with the single "The One I Love". The group signed to Warner Bros. Records in 1988, and began to espouse political and environmental concerns while playing large arenas worldwide.
Document 14: Led Zeppelin: Led Zeppelin were an English rock band formed in London in 1968. The group consisted of guitarist Jimmy Page, singer Robert Plant, bassist and keyboardist John Paul Jones, and drummer John Bonham. The band's heavy, guitar-driven sound has led them to be cited as one of the progenitors of heavy metal, though their unique style drew from a wide variety of influences, including blues, psychedelia, and folk music.
Document 15: Melvins: The Melvins are an American rock band that formed in 1983 in Montesano, Washington. They have mostly performed as a trio, as well as a quartet with two drummers in recent years. Since 1984, vocalist and guitarist Buzz Osborne and drummer Dale Crover have been constant members. The band was named after a supervisor at a Thriftway in Montesano, Washington, where Osborne also worked as a clerk. "Melvin" was despised by other employees, and the band's members felt it to be an appropriately ridiculous name. Their early work was key to the development of both grunge and sludge metal.
ground_truth: Michael Stipe