Question: What is the name of this South Korean musician, singer-songwriter, record producer and actor in the rock band CNBLUE, who wrote the song You, My Star?

Context paragraphs:
Lee Jong-hyun: Lee Jong-hyun (Hangul: 이종현; ] ; born on May 15, 1990) is a South Korean musician, singer-songwriter and actor.  He is the lead guitarist and vocalist of South Korean rock band CNBLUE.

White (CNBLUE song): "White" (stylized "WHITE") is a song by South Korean rock band CNBLUE.  It was released on April 8, 2015, as their ninth single under Warner Music Japan and 12th single overall in Japan.  The song was conceived by guitarist Lee Jong-hyun in midst of the CNBLUE 2014 Arena Tour "Wave" concerts.  The song was written by band members Lee Jong-hyun and Jung Yong-hwa, in addition to miwa.  Portraying a message of hope, "White" combines the band's rock style and infuses a synthesizer to create a sound distinctive from the band's previous work.

You, My Star: "You, My Star" (별, 그대 ; "Byeol, Geudae " ) is a song by South Korean musician Jung Yong-hwa of CNBLUE.  Written in dedication to his fans, the song was released in December 23, 2013, under FNC Entertainment.  Two days prior, Jung performed the song on the year-end music program "SBS Gayo Daejeon".  "You, My Star" debuted and peaked at number 22 no South Korea's national Gaon Digital Chart; all proceeds went to the label's charity Love FNC.

I'm a Loner: "I'm a Loner" (외톨이야 ; "Oetoriya") is a song by South Korean pop-rock idol band CNBLUE.  It is the debut and lead single to the band's first mini-album "Bluetory".  Written by Han Seong-ho and Amen, the punk-rock track was released under FNC Music on January 14, 2010.  Upon its release, CNBLUE achieved immediate commercial success; the song earned the band its first two music show wins on Korean Broadcasting System's (KBS) "Music Bank" and Seoul Broadcasting System's (SBS) "Inkigayo".  Unprecedented at the time, CNBLUE held the record for shortest period between debuting and earning a music show win for four and a half years.  The song also peaked at number two on the Gaon Digital Chart.

Blue Moon World Tour: 2013 CNBLUE Blue Moon World Tour was the 2013 live concert tour of South Korean rock band CNBLUE in support of their fifth EP, "", which was released on 14 January 2013.  The world tour commenced, at the conclusion of promotional activities in South Korea, with one show in Taiwan in April 2013 and scheduled concerts for Singapore, Thailand, Hong Kong, South Korea, Australia, Philippines and Malaysia, thru August 2013.  Subsequent concert dates added China and Indonesia; and extended the tour into January 2014, for concerts in the United States,Mexico, Peru, and the final concert in Chile, for a total of 20 concerts in 14 countries and 18 cities.

Thank U (album): Thank U is the debut Japanese studio album by the South Korean rock band CNBLUE.  The album was released on March 20, 2010 in Japan and the majority of the songs were sung in English with the exception of "voice" and "a.ri.ga.tou."  Several of the songs on this album were later released in Korean in the band's debut Korean album, "First Step".  This album is the first of the two indie albums CNBlue released before signing with Warner Music Japan for their major Japanese debut on October 19, 2011.  The album sold over 10,237 copies.

Can't Stop (EP): Can't Stop is the fifth Korean mini-album (ninth overall) by the South Korean rock band CNBLUE.  It was released on February 24, 2014 with the track "Can't Stop" as the promotional single.  This mini album marks a whole turn on CNBLUE's music.  Its lead singer, Jung Yong-hwa ditches the guitar and plays piano on most of the songs.  The style of this album is, as its leader singer stated on an interview, a bit of brit rock meets melodic pop rock and even Latin melodies that can be heard in Diamond Girl.

Jung Yong-hwa: Jung Yong-hwa (; ] ; born June 22, 1989) is a South Korean musician, singer-songwriter, record producer and actor.  He is the leader, lead vocalist and rhythm guitarist of the rock band CNBLUE.  Jung made his television debut in "You're Beautiful" (2009), and has since starred in television dramas "Heartstrings" (2011), "Marry Him If You Dare" (2013) and "The Three Musketeers" (2014).  In 2015, Jung made his solo debut with the album "One Fine Day".

Kang Min-hyuk: Kang Min-hyuk (; born on June 28, 1991) is a South Korean musician, singer-songwriter, and actor.  He is the drummer of South Korean rock band CNBLUE.

Lee Jung-shin: Lee Jung-shin (이정신, born on September 15, 1991) is a South Korean musician, singer, rapper, and actor.  He is the bassist of South Korean rock band CNBLUE, which debuted in January 2010 in South Korea.

Supporting paragraphs: You, My Star Jung Yong-hwa
Answer: Jung Yong-hwa