B1A4 (Palace in Ipoh) belonging to the five-Member musical group WM entertainment Korea men.
1 A 4 B group name is called, All for one ' Be the o n e ' as it stands, "is one of the five people the best". Also, ' B ', one A-4 is a unique means too. 2011 April 21, the first mini album, released on the Fly Let's do April 23, MBC's show! In the center of the music, the gajyeosseumyeo debut that year, September 16, the second mini album, released on A 4 year activities It B 1.
2012 March 14, laid the first Studio album released on the IGNITION.