The discography of Rock City (also known as R. City and Planet VI)—a songwriting and record production duo from Saint Thomas, U.S. Virgin Islands—consists of one studio album, 16 mixtapes, eight singles (including four as a featured artist) and 21 music videos. Rock City is primarily known for their songwriting and production, having written or produced songs such as "Pour It Up" by Rihanna, "Replay" by Iyaz, "Bow Down/I Been On" by Beyoncé and "We Can't Stop" by Miley Cyrus.
 Many albums that Rock City has contributed to have won or been nominated for Grammy Awards.
 For instance, the duo wrote "If This Isn't Love" on Jennifer Hudson's Grammy Award-winning self-titled album.
"Pour It Up" is a song by Barbadian recording artist Rihanna from her seventh studio album, "Unapologetic" (2012).
 It was serviced to urban radio stations in the United States on January 8, 2013, as the second US single, and third overall single from the album.
 It was later also sent to contemporary hit radio radios in the country.
 "Pour It Up" was co-written by Rock City and co-written and produced by Michael Williams and co-produced by J-Bo.
 It is a club and trap song with a minimal hip hop beat.
 Rihanna brags about her wealth, which serves as both a strip club anthem and a declaration of independence.
"23" is a song by American record producer Mike Will Made It, featuring American singer Miley Cyrus, and American rappers Wiz Khalifa and Juicy J; it was released on September 10, 2013 by Interscope Records.
 The song was written and produced by Mike Will Made It, with additional songwriting provided by Juicy J, Khalifa, Pierre Ramon Slaughter, and Rock City.
 "23" is set to a midtempo beat and lyrically references Air Jordan sneakers and recreational drug use.
Michael Len Williams II (born March 23, 1989), known professionally as Mike Will Made It (often stylized as Mike WiLL Made-It) or simply Mike Will, is an American record producer, rapper, singer and songwriter from Atlanta, Georgia.
 He is best known for producing trap beats for several Southern hip hop artists as well as for producing several singles, such as "Black Beatles" by Rae Sremmurd, "Mercy" by GOOD Music, "No Lie" by 2 Chainz, "Bandz a Make Her Dance" by Juicy J, "Pour It Up" by Rihanna, "Love Me" by Lil Wayne, "Body Party" by Ciara, "We Can't Stop" by Miley Cyrus, "First Day Out the Feds" by Gucci Mane, "Formation" by Beyoncé, and "Humble" by Kendrick Lamar.
 He has released six mixtapes.
Rock City is a roadside attraction on Lookout Mountain in Lookout Mountain, Georgia, located near Ruby Falls.
 It is well known for the many barn advertisements throughout the Southeast and Midwest United States that have the slogan "See Rock City" painted on roofs and sides.
 Clark Byers painted over 900 barn roofs in nineteen states to advertise for Rock City from 1935 to 1969.
"Rock City" is a song by American rapper Royce da 5'9", released as the third single from his debut album, "Rock City (Version 2.0)", which was released in 2002 through E1 Music (formerly "Koch Records") and Game Recordings, after another record label had turned down his first version of the album.
 The song also features vocals from rapper Eminem, becoming Eminem's debut appearance on one of Royce's solo albums.
 The single was released on January 5, 2002, the same date as its same titled album was released.
 "Rock City" charted at #99 on the Hot R&B/Hip-Hop Singles & Tracks chart in 2002.
 Not counting Bad Meets Evil or Slaughterhouse songs, "Rock City" is Royce da 5'9"'s most successful single chart-wise.
Rock City is a park located on hillsides overlooking the Solomon River in Ottawa County, Kansas.
 It is 3.6 miles south of Minneapolis, Kansas and just over 0.5 mile west of Kansas highway K-106 and the Minneapolis City County Airport on Ivy Road.
 In a patch of prairie about 500 meters (1600 feet) long and 40 meters (130 feet) wide, Rock City contains three clusters of large spherical boulders.
 These three clusters contain a total of 200 spherical boulders.
 It has been designated as a National Natural Landmark.
"Man Down" is a song by Barbadian singer Rihanna from her fifth studio album, "Loud" (2010).
 Singer Shontelle and production duo Rock City wrote the song with its main producer, Sham.
 They wrote it during a writing camp, in Los Angeles of March 2010, held by Rihanna's record label to gather compositions for possible inclusion on the then-untitled album.
 Rock City were inspired by Bob Marley's 1973 song "I Shot the Sheriff" and set out to create a song which embodied the same feel, but from a female perspective.
 "Man Down" is a reggae murder ballad which incorporates elements of ragga and electronic music.
 Lyrically, Rihanna is a fugitive after she shoots a man, an action she later regrets.
 Several critics singled out "Man Down" as "Loud"' s highlight, while others commented on her prominent West Indian accent and vocal agility.
The Rock City Crew (also known as the X-Treeme Team) were a group of breakdancers based in Nottingham in the 1980s.
 The crew was founded by Rock City nightclub DJ Jonathan Woodliffe.
 Woodliffe was involved in starting the successful Saturday afternoon hip hop jams at Rock City as well as the club night on Fridays which attracted people from across the UK.
 The Saturday afternoon jams were initially set up at the request of Trent FM, who later pulled out, and provided an opportunity for young kids to display their dancing skills.
Live at Rock City - Bootleg Series Volume 2 is the second album released in British rock band Enter Shikari's live bootleg series.
 The album was released in 2010, and was recorded at Nottingham's Rock City during their tour of their previous studio album "Common Dreads", released in 2009.

Question: WHICH MIKE WILL MADE IT SONG WAS CO-WRITTEN BY ROCK CITY?
Answer: Pour It Up