Oh My Girl was publicized as the new sister group of B1A4. In March 29, 2015, teaser images of the eight members were released as well as their concept images. On April 20, the group released their first single, "Cupid", and held their debut showcase the same day.
Stellar (Korean: 스텔라, stylized as STELLAR) is a South Korean girl group that debuted in 2011 under The Entertainment Pascal (formerly known as Top Class Entertainment). The group received attention prior to debuting for being produced by Shinhwa member Eric.