Bad Girl Good Girl

"Bad Girl Good Girl" is a song recorded by K-pop girl group Miss A for their debut EP Bad But Good. The song served as the group's debut single in June 2010. An instant commercial success in South Korea, "Bad Girl Good Girl" topped the Gaon Digital Chart and became the best-performing single of 2010. It also won several awards, including Song of the Year at the Mnet Asian Music Awards.

Release
On June 30, 2010, both "Bad Girl Good Girl" and their first EP Bad But Good were released.

Music video
On June 30, 2010, the music video for the song was released online. The music video features the girls in a school, dancing in sync.

Performances
The group had their debut performance on July 1, 2010, with "Bad Girl Good Girl" on Mnet M! Countdown. They were number one for the first time on M! Countdown on July 22. Miss A became number one again on KBS Music Bank the following day on July 23 and on SBS Inkigayo on August 1. "Bad Girl Good Girl" was awarded Song of The Month on Cyworld, one of the biggest Korean music portals.