Wikipedia
T-ara is a South Korean girl group that debuted in 2009 under Core Contents Media, now known as MBK Entertainment. Before their debut, there was a high level of interest in the group as they were called the "Super Rookies" and had been training for three years prior.
Originally a five-member group composed of Jiae, Jiwon, Eunjung, Hyomin, and Jiyeon, they released their first song "Good Person" for the soundtrack of the Korean drama Cinderella Man in April 2009. After Jiae and Jiwon withdrew from the group two months later, T-ara debuted as a six-member group with the addition of Boram, Soyeon, and Qri in July 2009, releasing their first single " Lie" .
Their debut studio album Absolute First Album was released in December 2009 and spawned several hit singles including " TTL (Time to Love)", " Bo Peep Bo Peep", and "You Drive Me Crazy" . The album was followed by the group's first extended play, Temptastic, in 2010. Their second extended play John Travolta Wannabe (2011) produced " Roly-Poly", which was nominated for several awards and went on to become the Gaon chart's number one single of the year. In less than six months, the group released their third extended play Black Eyes (2011), which spawned three number one singles: "Cry Cry", "We Were in Love" and " Lovey-Dovey".
In 2011, T-ara signed a $4.7 million contract with management company J-Rock for their Japanese debut, the highest out of all the Korean girl groups debuting in Japan. The group's first single was a remake of their 2009 hit "Bo Peep Bo Peep". It ranked at number one on the Oricon weekly charts. T-ara is regarded as the most popular K-pop girl group in China.