On March 3, 2011 TS Entertainment revealed that Bang Yongguk will be the featured rapper in Song Jieun's "Going Crazy".
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In March 2011, he was featured in Song Jieun's Going Crazy and the single became a number one hit in South Korea.
In 2011, she released her second single, "Going Crazy" featuring Bang Yong Guk which went to become her first number one single in the Gaon Charts as a solo artist.
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After Secret's great success with "Shy Boy", TS Entertainment announced that Jieun will make her solo comeback with the song "Going Crazy".
Crazy Horse | Drive Me Crazy | Crazy | Gun Crazy | Crazy Mohan | Shine On You Crazy Diamond | Ram "Crazy Horse" Vaswani | Eight Crazy Nights | Crazy Town | Crazy Heart | Crazy (Gnarls Barkley song) | The Crazy Gang | Stone Crazy | One Crazy Summer | Going Crazy | Crazy Thunder Road | Crazy in Alabama | Crazy Horse (band) | Crazy English | The Gods Must Be Crazy | Super Crazy | Girl Crazy | Crazy Train | Crazy, Stupid, Love | Crazy Eights | We Weren't Crazy | Plane Crazy | Miss You Like Crazy | I Want Crazy | I'm So Crazy |
In 2001 she released her second album, Miss Jealousy, a pop/rock album which included the top 20 hit single "You Got Me Going Crazy", written by Johan Åberg and Paul Rein, known for their work with Christina Aguilera and Victoria Beckham.
Paul Scofield played Johnny, a slimy, small-time music promoter and talent scout who notices teenage girls going crazy for the singing and bongo playing of talentless and seemingly idiotic Herbert Rudge (played by James Kenney).