Goo Hara (/ˈɡuːhɑːrə/; Korean: 구하라; January 3, 1991 – November 24, 2019), also known mononymously as Hara, was a South Korean singer and actress. She was a member of the K-pop girl group Kara, and had also appeared in television dramas including City Hunter (2011). She made her debut as a soloist in July 2015 with the release of her EP Alohara (Can You Feel It?). After Kara disbanded in 2016, she continued her solo career at another agency, KeyEast. In June 2019, she signed with Production Ogi and continued her solo activities in Japan where she was well received by fans. Her last release was maxi single "Midnight Queen" on September 19, 2019. In November 2019, she embarked on a Japanese mini tour to support the album.

Goo was found dead at her home in Seoul on November 24, 2019, aged 28. Her death was ruled a suicide. Leading to her death, Goo had experienced multiple traumatic events: a legal battle with her ex-boyfriend, Choi Jong-Bum, who assaulted Goo in 2018 and threatened to release a sex video of them; constant harassment from part of the Korean public, aimed at making K-pop idols conform to a strict moral code; and the suicide of her close friend Sulli, who suffered similar public scrutiny, a month prior to her own death.

Goo's death was followed by calls for reform, including petitions submitted to the Cheong Wa Dae regarding sex crimes, cyberbullying, and South Korean inheritance law. It was later disclosed that Goo had a pivotal role in leading her friend Choi Jong-hoon to reveal the identity of a corrupt police officer who had protected members (including Choi himself) of the KakaoTalk chatrooms, which shared rape videos.

Goo Hara was born on January 3, 1991, in Gwangju, South Korea. Goo's parents separated when she was eight years old after her mother abandoned the family. Goo and her brother were raised by their grandmother while their father was working as a construction worker around the country to support the family. She attended Woonchun Elementary School [ko] and Jeonnam Middle School [ko], and trained as a track and field athlete for two years.

Goo came to Seoul while attending Jeonju Fine Arts High School [ko] and participated in SM Entertainment's youth appearance tournament in 2005. She later transferred to Dongmyung Girls' Information Industry High School [ko] and then attended Sungshin Women's University. During her school days, she worked as a model for internet clothing stores. In 2007, she unsuccessfully auditioned to join JYP Entertainment.

Goo joined the girl group Kara in 2008, following the departure of former member Kim Sung-hee. In October 2009, she became a cast member of the KBS reality show Invincible Youth. On January 5, 2010, during an appearance on the SBS reality show Strong Heart, Goo admitted that she had had dental and minor facial cosmetic surgery. She stated that she had always had double eyelids, but had surgery to make them more defined.

In 2011, Goo made her acting debut in SBS City Hunter, where she starred as Choi Da-hye, the daughter of South Korea's president. On January 19, 2011, it was announced that Goo would be terminating her contract with her label DSP Media along with three other members of Kara, and a lawsuit was filed on their behalf. Later that day, it was announced that she would discontinue her involvement with the suit and had rejoined the company, as she apparently was not fully aware of the lawsuit's details. In November 2011, she and Nicole Jung (a fellow member of Kara) became the new MCs for Inkigayo, and they left the show on August 19, 2012, to focus on Kara's comeback.

In 2013, Goo collaborated with Japanese musician and songwriter Masaharu Fukuyama to record a song called "Magic of Love" in Korean under the project group, Hara+. The song was used as a soundtrack for FujiTV's drama Galileo, in which Fukuyama starred. In October 2013, she was appointed as the blood donation ambassador for the Hanmaum Blood Bank. On December 29, 2014, she appeared in her own reality show titled On & Off, which aired on MBC Music.