This American artist made the Billboard top 25 and was a well known YouTuber and also for her participation in which NBC singing competition? 
The Voice
Side A (EP)
Side A is the second EP by American artist Christina Grimmie.
 The album was released for digital download on February 21, 2016.
 The EP was produced by Maker Music and AwesomenessTV.
 Physical copies of the album were sold at Grimmie's tour appearances and shows.
 The EP was released independently and debuted at number 25 on the "Billboard" Independent Albums chart in the US.
 This marked her final release prior to her death on June 10, 2016.
Christina Grimmie
Christina Victoria Grimmie (March 12, 1994June 10, 2016) was an American singer, songwriter, musician, actress and YouTuber known for her participation in the NBC singing competition "The Voice" and for her covers of hit songs by contemporary pop musicians.
 In June 2011, she released her debut EP, "Find Me".
 Her studio album "With Love" was released in 2013.
 A second EP, "Side A", was released in 2016.
 A posthumous release, "Side B", was also made available on iTunes and Spotify.
 Her posthumous album, titled "All Is Vanity", was released on June 9, 2017.
Siouxsie Sioux
Susan Janet Ballion, better known by her stage name Siouxsie Sioux (/ˈsuːziː suː/ , born 27 May 1957), is an English singer, songwriter, musician and producer.
 She is best known as the lead singer of the alternative rock band Siouxsie and the Banshees (1976–1996) and the drums-and-voice duo the Creatures (1981–2005).
 Siouxsie and the Banshees released 11 studio albums and several UK Top 20 singles including "Hong Kong Garden", "Happy House", "Peek-a-Boo", plus a US Billboard Top 25 hit "Kiss Them for Me".
 With the Creatures, Siouxsie recorded four studio albums and the hit single "Right Now".
 She has also sung with artists such as Morrissey and John Cale.
 After disbanding the Creatures in the mid-2000s, she has continued as a solo artist and released "Mantaray" in 2007. Cole Vosbury
Allen Cole Vosbury (born April 29, 1991), known simply as Cole Vosbury, is an American singer-songwriter and musician.
 He is best known for his appearance on Season 5 of the NBC singing competition "The Voice" as a member of CeeLo Green's team and later Blake Shelton's team.
 During his time on "The Voice", six of Vosbury's singles charted on the "Billboard" charts. Will Champlin
William Christopher Champlin (born April 24, 1983) is an American singer-songwriter, best known for his appearance on Season 5 of the NBC singing competition "The Voice" as part of Adam Levine's team.
 He finished in third place behind Jacquie Lee, the runner-up, and Tessanne Chin, the winner of the season. James Wolpert
James Wolpert (born December 26, 1990) is an American singer, best known for his appearance on Season 5 of the NBC singing competition "The Voice" as part of Adam Levine's team. Anahit Mekhitarian
Anahit Mekhitarian (also spelled Mkhitaryan or Mkhitarian) (Armenian: Մխիթարյան Անահիտ; Russian: Анаит Мхитарян) (born March 6, 1969) is an Armenian operatic soprano.
 A leading soloist of the National Theater of Opera and Ballet of Armenia, she was conferred the title of Honored Artist of the Republic of Armenia in 2003.
 In 2013 on the occasion of Republic day, she was awarded medal for .
 She has won first prize at three international singing competitions: the Francesc Viñas International Singing Competition (Spain, 1990), the Vincenzo Bellini International Competition (Italy, 1991), and the Julián Gayarre International Singing Competition (Spain, 1996). Willie &quot;Pdub&quot; Moore Jr.
William Moore Jr. (born December 20, 1978), better known by his stage names Pretty Willie, Willie Moore, and P-Dub, is an actor, comedian, producer, speaker, radio host, Christian R&B artist and licensed minister from St. Louis, Missouri.
 Moore has also been known to work with Christian rap artist Bizzle.
 His collaboration with Bizzle on their "Best of Both Worlds: The Album" peaked at 42 on the Billboard Top Christian Albums chart, 27 on the Billboard Top Gospel Albums chart and 25 on the Billboard Heatseekers Albums chart. Sam Mangubat
Samuel Marbella Mangubat (born December 21, 1990), more popularly known as Sam Mangubat, is a Filipino singer, song-writer and YouTuber.
 He first gain popularity via online for his viral covers posted on his self-titled YouTube channel.
 He then rose to fame after joining on national television singing competition "Tawag ng Tanghalan" on the noon-time television show "It's Showtime" and became the first runner-up of the competition.
 He was dubbed as the "Uploaded sa Galing ng Luzon" during the whole course of competition. Beverley Mitchell (album)
Beverley Mitchell is the self-titled debut album from American actress and singer, Beverley Mitchell.
 It was released on January 23, 2007.
 She co-wrote 8 songs on her debut album.
 Her first single "Angel" was released in late 2006.
 The album debuted at #30 (Hot Shot) on the Billboard Top Country Albums chart and #8 on the Billboard Top Heatseekers chart.
 The album also peaked at #19 on the Billboard Top Internet Albums chart.