Son Ga-in (born September 20, 1987), better known mononymously as Gain, is a South Korean singer, actress and entertainer.
 She is best known as a member of the South Korean girl group Brown Eyed Girls and for her appearances alongside Jo Kwon from 2AM for TV shows "We Got Married" and "All My Love".
 As a solo artist she has released six EPs.
The Mnet Asian Music Award for Best Collaboration is an award presented annually by CJ E&M Pictures (Mnet).
 It was first awarded at the 12th Mnet Asian Music Awards ceremony held in 2010; singers Ga-in & Jo Kwon won the award for their song "We Fell in Love", and it is given in honor for the artists with the most artistic achievement in collaboration performances in the music industry.
"Nagging" () is a song recorded by South Korean singers IU and Lim Seulong.
 Written by Kim Eana and composed by , the pop ballad duet was used as one of the theme songs for the second season of the variety show, "We Got Married", along with "We Fell in Love" by Jo Kwon and Ga-in.
2AM (Korean: 투에이엠 ) was a South Korean boy group, that consisted of Jo Kwon, Lee Changmin, Lim Seulong and Jeong Jinwoon.
 It was one of the two subgroups split from the eleven-member boy band One Day, the other being 2PM.
 They officially debuted on July 11, 2008, on KBS's "Music Bank", performing the song "This Song".
 They won their first Mutizen at Inkigayo on February 7, 2010, with "Can't Let You Go Even If I Die".
All My Love () is a South Korean sitcom starring Kim Kap-soo, Park Mi-sun, Jo Kwon, Ga-in, Yoon Doo-joon, Jun Tae-soo and Yoon Seung-ah.
 It began broadcasting on November 8, 2010 on MBC and its final episode aired on September 16, 2011.
Kwon Se-in (born June 29, 1982), better known as Kwon Yul actor.
 He made his acting debut with a leading role in the 2007 high school sitcom "Mackerel Run".
 Kwon is best known for his roles as Seo Ji-seok on the daily soap opera "Angel's Revenge" (2014), in the blockbuster period film "" (2014), and more recently as Lee Sang-woo in the hit romantic comedy series "Let's Eat 2" (2015).
 In 2017, Kwon starred in legal thriller drama "Whisper" alongside actress Lee Bo Young and Lee Sang-yoon.
Queen of the Office (; lit.
 "God of the Workplace") is a 2013 South Korean television series starring Kim Hye-soo, Oh Ji-ho, Jung Yu-mi, Lee Hee-joon, Jeon Hye-bin, and Jo Kwon.
 It aired on KBS2 from April 1 to May 21, 2013 on Mondays and Tuesdays at 22:00 for 16 episodes.
 Kim later won the Daesang (or "Grand Prize"), the highest honor at the 2013 KBS Drama Awards.
Jo Kwon (Hangul: 조권, hanja: 趙權; born on August 28, 1989) is a South Korean singer, MC, actor, entertainer and leader of South Korean boy band 2AM.
Choi Sung-hee (born February 28, 1980), better known as Bada or Sea, is a South Korean singer and musical actress.
 She is a member of South Korean girl group S.E.S..
 She has released four studio albums, one mini albums and five singles.
 She won Best Actress at the 3rd The Musical Awards and has starred in ten musicals to date.
The Gaon Music Chart tabulates the relative weekly popularity of songs or albums in South Korea.
 It is compiled by the Korea Music Content Industry Association and sponsored by South Korea's Ministry of Culture, Sports and Tourism, with an aim to create a national chart for South Korea similar to the "Billboard" charts of the United States and the Oricon charts of Japan.
 It started tracking sales since the beginning of 2010.
 It was officially launched in February 2010 with a launching ceremony held on 23 February 2010 at the Westin Chosun hotel in Seoul.
 The launch also included a small awarding ceremony, which awarded girl group Girls' Generation with top artist of January and boy band Super Junior with best album of 2009.
 Meanwhile, Hit single "We Fell In Love", performed by Jo Kwon of 2AM and Ga-in of Brown Eyed Girls, took the title of best weekly mobile ringtone.

Question: Who has starred in more musicals, Jo Kwon or Bada?
Answer: Bada