Formed by Big Hit Entertainment in 2010, they are also known as the Bangtan Boys. They officially debuted on June 12, 2013 with a debut single album called 2 Cool 4 Skool after a delay to reorganize them into a more traditional idol group. They broke a YouTube record previously held by Taylor Swift for most-viewed video within 24 hours with the song "IDOL." Another song of theirs, "Boy with Luv," shattered even more YouTube records.