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Hyuna (born Kim Hyun Ah; June 6, 1992) is a South Korean dance-pop singer. She is a member of the girl group 4Minute and was a member of Wonder Girls.

In 2007, Hyuna debuted with the Wonder Girls, a girl group managed by JYP Entertainment, with the single "Irony" as the group's main rapper. She left the group in July when she was removed by her parents due to their concern over her health—in particular, chronic gastroenteritis and fainting spells. After a hiatus of two years, Hyuna featured in label mate, AJ's "Dancing Shoes" and "2009" in 2009. She was then transferred over to JYP Entertainment's sister label, Cube Entertainment. After joining Cube, Hyuna joined girl group 4Minute. Announced in May 2009, the group debuted with their single, "Hot Issue" on June 15, 2009.

2010: Solo debut and controversy

It was announced by Cube Entertainment that Hyuna would release a solo single, titled "Change". The single was released in January 2010 and debuted high on various online charts while also becoming a top search term. Hyuna commenced promotions for "Change" on KBS's Music Bank.
On January 14, 2010, the "Change" music video was flagged with a 19+ rating due to Hyuna's provocative dancing, citing it to be inappropriate to minors. Cube Entertainment stated that the MV would be re-edited and submitted for approval. Broadcast stations SBS, however, announced the MV would be restricted for a 15+ audience instead, and MBC announced that it would still be viewable for all audiences. Her "Change" promotions ended in March 2010. Hyuna was also part of "Invincible Youth", a South Korean variety show. However, she left the show due to some scheduling conflicts with her group's overseas promotions on June 11, 2010.

On April 16, Hyuna released a digital single, "Outlaw in the Wild (Korean: 황야의 무법자)", featuring Nassun and was produced by E-Tribe.

2011: Bubble Pop! and Trouble Maker

CEO Hong Seungsong of Cube Entertainment announced that Hyun-a would make a comeback with her first mini-album in May, 2011. He stated that, "Hyun-a will have her second solo song which is expected to be released in May. Though this time, fans should expect a radical change in her concept."

After several teasers, Hyuna released her first mini album, titled Bubble Pop! featuring five new songs, with a title track titled "Bubble Pop!". The MV teaser for "Bubble Pop!" was released on June 30, 2011 and the music video was released on July 5. The MV also stars MBLAQ's Lee Joon. In August, the Korea Communications Standards Commission partially banned TV broadcasting of the video for allegedly racy content. “Bubble Pop” was #9 and #3 on USA's Spin magazine’s “Best 20 Songs of 2011″ and "SPIN's Favorite Pop Tracks of 2011".

On November 24, 2011 Cube revealed that she will be in a co-ed sub-unit called Trouble Maker with BEAST's Hyunseung. Trouble Maker's first mini album, "Trouble Maker", consists of a dance track as well as an emotional ballad, a solo song for Hyun-a, and a solo song for Hyunseung. The unit started revealing their teaser photos on November 25 through their official YouTube channel "troublemakerofficial", and unleashed their album on December 1.

2012: Ice Cream

On March 14, 2012 was revealed that Hyuna will be launching her own fashion brand called, Hyuna x SPICYCOLOR. Hyuna x SPICYCOLOR will be a "retro, chic, and sexy" concept, pulling inspiration from the vintage looks of the 1950s and 1960s. Hyuna intends to be highly involved, starting from the concept development, design, as well as directing the photo shoots. Hyuna stated, "Although as an artist I did show a lot of sexy concepts, for this brand which will be launching at the end of March, I worked very hard to deliver styles that are not only sexy, but also fashionable and stylish. For this spring, if you own a single item mixed with lace, anyone can easily complete a trendy look."

Hyuna also appeared as the central female dancer and love interest in the PSY music video for "Gangnam Style," having been selected personally by PSY during the initial production stage. PSY released the female version of Gangnam Style, known as "Oppa Is Just My Style" in August 2012, featuring additional vocals by Hyuna.

Hyuna released her second mini album titled Melting on October 21, 2012 with the title track "Ice Cream". The song is produced by mega hitmaker Brave Brothers, being the first collaborative effort between the producer and Hyuna as a solo artist. The video for Ice Cream was released on October 22, 2012 and features a cameo by PSY. Four days after release, the music video tied the record for the K-pop music video to achieve ten million views on YouTube the fastest. The record is now held by both Girls' Generation's "The Boys" in addition to "Ice Cream". This achievement is especially notable because it even exceeds PSY's attachment rate for his viral hit, "Gangnam Style", which took fifteen days to acquire the same number of views. Melting is also notable for Hyuna's contributions as a lyricist and composer for "Very Hot" and "To My Boyfriend".
In October, reports suggested that "Very Hot" from Hyun-a's second EP Melting was banned by television networks KBS and MBC. The networks objected to the use of the brand KakaoTalk.

On November 14 was revealed that Hyuna along with Hara & Hyorin have been chosen to be soju models for Lotte Liquor.

On the October 21, 2012 episode of Inkigayo, the live music show revealed a teaser video hinting that twenty of the most-wanted K-pop stars would transform into four new project groups in the yearly event. Hyuna will be part of the girl group Dazzling Red with Sistar's Hyolin, Secret's Hyosung, After School's Nana and KARA's Nicole. Brave Brothers is set to produce the group's new title song. Slated to air on December 29, the group will perform the tunes only one time on stage and the profits from online streaming and downloading of the songs would be donated to people in need. The song "This Person" was released on December 27, 2012.

On December 28, 2012 Hyuna was featured in Eru digital single "Don't Hurt". .