Question: Simon Wilcox is a songwriter based in Los Angeles, she has written multiple platinum and gold singles, working with artists such as which American singer, songwriter, ambient music composer and YouTube personality?
Context: Daniel Alan Spitz (born January 28, 1963) is an American musician and watchmaker best known for his work as the lead guitarist, principal songwriter and co-producer of the American heavy metal band Anthrax from 1983 to 1995 and from 2005 to 2008.  With Anthrax, Spitz was nominated for three Grammy awards and has been awarded platinum and multiple platinum RIAA certified albums for his entire Anthrax catalog of work.  Dan Spitz is the first heavy metal songwriter to have his music playing on two planets.  NASA chose his song alongside only 9 other artists such as Frank Sinatra and the Beatles to be played on the Lunar Rover Curiosity making him the first heavy metal artist to have a top 10 charting song on two planets.  Spitz also founded the Christian music group Red Lamb alongside Dave Mustaine of Megadeth as his writing partner, the first to bring autism awareness into any genre of music or music video. Simon Wilcox is a songwriter based in Los Angeles.  She has written multiple platinum and gold singles, working with artists such as Nick Jonas, Enrique Iglesias, Tinashe, Demi Lovato, Five Seconds of Summer, Britney Spears, Fifth Harmony, Poppy, and DNCE, among others.  Her songs have been used extensively in film and television. American rock band Breaking Benjamin has released five studio albums, one compilation album, three extended plays, sixteen singles and ten music videos.  The group has sold over 7 million units in the United States alone, with three platinum records, two gold records, two multi-platinum singles, two platinum singles, and five gold singles as designated by the RIAA.  The band signed with Hollywood Records in 2002 following the success of their independently-released eponymous EP, and began recording their first full-length major-label debut "Saturate" shortly thereafter.  The record peaked at No. 2 on the "Billboard" Heatseekers chart and No. 136 on the "Billboard" 200 chart.  It was certified gold more than thirteen years later.  The band's sophomore effort, "We Are Not Alone", released in 2004, peaked at No. 20 on the "Billboard" 200, and was later certified platinum in the United States and gold in New Zealand.  Breaking Benjamin's third studio album "Phobia" was released in 2006 and reached No. 2 on the "Billboard" 200 chart, No. 1 on the Digital Albums chart, No. 1 on the Rock Albums chart, and was certified platinum nearly three years after its release.  Breaking Benjamin released their fourth record in late 2009 titled "Dear Agony", reaching No. 1 on the Hard Rock Albums and Modern Rock/Alternative Albums charts, No. 2 on the Rock Albums and Digital Albums charts, and No. 4 on the "Billboard" 200.  The record was certified gold three months after its release and was eventually certified platinum seven years later. "Chainsaw" is a song recorded by American singer Nick Jonas from his third studio album, "Last Year Was Complicated".  It was released on May 13, 2016, by Island, Safehouse and Republic Records as the album's second Promotional single.  The song was written by Nick Jonas, Simon Wilcox, Sean Douglas, Julia Michaels and Nolan Lambroza. Jeff Greinke is an American ambient music and jazz artist and composer currently based in Tucson, Arizona.  He is known as one of the pioneers of dark ambient music, with his earlier solo albums often compared to works by Robert Rich, Brian Eno, and Vidna Obmana.  Greinke's approach on his ambient works is to heavily layer, mutitrack, and texture soundscapes, effectively using the studio as an instrument. Gold (stylized as G O L D), is the debut studio album by American YouTube personality Ricky Dillon, released on January 15, 2016.  The album features the singles, "Steal the Show" featuring American singer and YouTube personality Trevor Moran and "Problematic" featuring American rapper Snoop Dogg. Poppy, also known as That Poppy, is an American singer, songwriter, ambient music composer and YouTube personality.  She moved to Los Angeles in 2014 to pursue a musical career, where she signed with Island Records and released her debut EP, "Bubblebath" (2016).  In late 2016, she became the face of Sanrio's "Hello Sanrio" collection. "Body Say" is a song recorded by American singer Demi Lovato.  She co-wrote the track with Simon Wilcox and its producer, Sir Nolan.  It was initially released exclusively to music streaming services through Island, Hollywood and Safehouse Records on July 1, 2016, was serviced to pop radio on July 12, 2016, and was made available to iTunes on July 15, 2016. David Jost (born 12 August 1972) is an international music producer, singer-songwriter and DJ, born in Hamburg, Germany.  His career as an international songwriter, music producer and remixer has a track record of 74 platinum & 108 gold records and 14 No. 1 hits.  He has worked with platinum selling artist including Lady Gaga, Chris Brown, Tokio Hotel, Limp Bizkit, Selena Gomez, Nelly Furtado, Keri Hilson, Aura Dione, and Adam Lambert.  For Tokio Hotel, David Jost has composed, produced and mixed six platinum selling #1 Hit Singles and three platinum selling #1 albums, he also has developed the band and is managing them.  Tokio Hotel became the biggest international rock band to come out of Germany within two decades.  Jost's work with Tokio Hotel lead to 87 media-awards, including 4 MTV European Music Awards, the MTV Video Music award Japan, 4 MTV Latin Music Awards including song of the year for "Monsoon" and also the US MTV Video Music Award (Moonman).  Even though Jost managed several careers of big media artists, he only rarely answers interviews for the press and is known for principally never giving TV interviews.  For his work as a songwriter, Jost was named Germany's best songwriter (Rock & Pop) by the GEMA (the German equivalent to the ASCAP/BMI).  Jost is currently working in his Los Angeles studios. Sam Littlemore, also known as Sam La More, is a multiple platinum selling, ARIA award-winning record producer, APRA award-winning songwriter and recording artist working in Sydney and Los Angeles.  Littlemore is best known for "What You Waiting For? " (2004) by Gwen Stefani, "Changes" (2013) by Faul & Wad Ad vs. Pnau, "Can't Get Better Than This" (2012) by Parachute Youth, "High" (2013) by Peking Duk, "Don't Hold Back" (2007) by The Potbelleez and songs with Nellee Hooper, Rick Nowels, Nelly Furtado on "Loose" (2006), Arthur Baker, Pnau and Tonite Only.
Answer: Poppy