Question: Jeon Ji-yoon and Aaron Pauley are both singers, but which was a member of the band Of Mice & Men?
Context: The 270-member UCLA Bruin Marching Band, known as "The Solid Gold Sound", represents the university at major athletic and extracurricular events.  During the fall marching season, the band performs at the Rose Bowl for UCLA Bruin home football games.  Pregame shows by the band aim to build crowd energy and enthusiasm with traditional UCLA songs like "Strike Up the Band for UCLA", "Sons of Westwood", and "The Mighty Bruins".  Throughout the game, the band performs custom-arranged rock and pop songs, as well as the traditional fight songs and cheers of the university.  The UCLA Varsity Band appears at basketball games and other athletic contests in Pauley Pavilion. Of Mice & Men is the eponymous debut studio album by American metalcore band, Of Mice & Men.  It was originally planned to be released on February 23, 2010, however was delayed until the 9th of March. Of Mice & Men (often abbreviated OM&M) is an American metalcore band from Orange County, California.  The band's lineup currently consists of lead vocalist and bassist Aaron Pauley, lead guitarist Phil Manansala, rhythm guitarist Alan Ashby, and drummer Valentino Arteaga.  The group was founded by Austin Carlile and Jaxin Hall in mid-2009 after Carlile's departure from Attack Attack! .  Since 2009, the band has released four studio albums.  Carlile departed from the band in December 2016 citing that a long term health condition prompted his exit.  After Carlile's departure the band continue to pursue creating music with Pauley taking on both bassist and lead vocalist duties. Kwon So-hyun (born August 30, 1994), is a South Korean singer and actress.  She was known as a member of the South Korean girl group 4Minute, under Cube Entertainment.  She is also a former member of the South Korean girl group, Orange.  Before June 15, 2016 (end of her contract with Cube), Sohyun left 4Minute and the record label along with members Nam Ji-hyun, Heo Ga-yoon, and Jeon Ji-yoon. Jeon Ji-yoon (born October 15, 1990), better known mononymously as Jiyoon or by her stage name Jenyer, is a South Korean rapper, singer-songwriter and actress.  She was previously a member of South Korean girl group 4Minute and its sub-group 2Yoon.  She debuted as a solo artist on November 2, 2016, under the stage name Jenyer, with the release of her debut digital single, "I Do". 4Minute (Korean: 포미닛 ) was a five-member South Korean girl group formed in 2009 by Cube Entertainment with music singles and albums released primarily in South Korea and Japan.  The members of the group were Nam Ji-hyun, Heo Ga-yoon, Jeon Ji-yoon, Kim Hyun-a, and Kwon So-hyun.  The group debuted in June 2009 with its first single, "Hot Issue", and in December 2010, it released its first Japanese album, "Diamond".  In 2011, the group released its first Korean full-length album, "4Minutes Left". Rob Laakso is an American musician, record producer and engineer, best known as the recording partner of indie rock musician Kurt Vile, and as a multi-instrumentalist in his backing band The Violators.  Laakso is also a multi-instrumentalist in the shoegaze band Swirlies, and a former member of Mice Parade, contributing to the studio albums, "Obrigado Saudade" (2004), "Mice Parade" (2007) and "What It Means to Be Left-Handed" (2010). Aaron Pauley (born August 4, 1988) is an American musician, singer, songwriter, and bassist born in Vacaville, California.  He is most prominently known as the lead vocalist and bassist for the American heavy metal band Of Mice & Men.  He formerly was the lead vocalist in the bands Jamie's Elsewhere and Razing Alexandria. H-Logic is the fourth studio album by South Korean singer Lee Hyori, released on April 12, 2010.  The album has 14 tracks, including collaborations with Daesung from Big Bang, Jeon Ji-yoon from 4Minute, Bekah from After School, Gary from Leessang, and Sangchu from Mighty Mouth.  The singer worked also with E-Tribe, the team behind "U-Go-Girl", the lead single from her previous album. Things We Think, But Never Speak is the debut studio album by Houston, Texas post-hardcore band Like Monroe.  The album was released on October 14, 2014 through eOne Music and Good Fight.  It was recorded at Think Sound Studios in Greensboro, North Carolina with producer Drew Fulk (Motionless in White, The Amity Affliction, For All Those Sleeping).  Two music videos have been released for the tracks "The Hills" and "So Beautiful" directed by Aaron Marsh (Of Mice and Men).
Answer: Aaron Pauley