Members Fei and Jia were casted in 2007. Fei was scouted on her way to dance school. Jia's school held auditions. Min auditioned when she was in the 6th grade, and traveled to the U.S for 6 years for training but came back in 2008 to continue activities in Korea. She is known to be a trainee who has been training for a long time along with Wonder Girls' Sunye (sun) and 2am's Jo Kwon. Members Fei and Jia appeared in 2pm's My Color music video. Suzy Bae was also a model.
They are Super Rivals with SISTAR.
Miss A made their official debut in early July 2010. Originally, Miss A was announced as a trio consisting of Fei, Jia and Suzy in June 2010. Prior to this, they were widely known to fans unofficially as JYP Sisters. They were a 5-member group in training in 2009, but had gone through several changes, most notably the exit of Hye Lim who joined the Wonder Girls, while two other girls had left. Suzy had then joined after this, and a name change was issued.
On June 22, 2010, Miss A was officially announced as a quartet, with Min joining the group. An official YouTube channel was made for them, premiering the music video for a Samsung Anycall campaign song, in which only three of the girls featured, titled "Dashi Sarang" (ë‹¤ì‹œ ì‚¬ëž‘ "Love Again"). Then, on June 30 the girls premiered the "Bad Girl Good Girl" music video for their debut single, "Bad But Good" containing four songs. Their debut stage, was on M! Countdown on July 1, starting promotion for the single. "Bad Girl Good Girl" has since become very popular, topping various online music charts.
On July 22, 2010, Miss A was number one for the first time on Mnet's M! Countdown with "Bad Girl Good Girl". The following day on July 23 the group took the number one title again on KBS Music Bank.
On August 1, 2010, Miss A claimed their first Mutizen on SBS Inkigayo with "Bad Girl Good Girl".
On September 26, 2010, Miss A released their second video "Breathe" on Youtube.
Fei : Leader, Vocalist, Main Dancer
Jia : Lead Dancer, Main Rapper, Vocals
Min : Lead Vocals, Lead Dancer
Suzy : Main Vocalist, Maknae