Group B1A4 has made their comeback performance today on Mnet "M! Countdown" and has revealed their thoughts on their comeback.

Today, they performed on stage their new song, "What Happened?" for the first time. The group expressed their gratitude to their fans for waiting for them as well as it was their first comeback in 5 months.

B1A4 stated, "We are excited to be able to show our fans a new and upgraded image of us through this new album."

B1A4 released their fourth mini album on May 6. The group worked together to help produce and write songs for the album as well.

They also held a large scale fan event yesterday to celebrate their comeback.