McCoy had discussed the band 's new album , '' The Papercut Chronicles II '' , " We 're about 12 demos deep . All I got to say is it 's definitely going back to the essence of Gym Class Heroes , which is four dudes sitting in a room , vibing off each other and making organic , dark metal . " On June 9 , 2011 , Gym Class Heroes released a song entitled " Stereo Hearts " which features Adam Levine from Maroon 5 . It is the first single to be released from '' The Papercut Chronicles II '' . It became available for download on iTunes on June 14 , 2011 . It peaked at No . 4 on the '' Billboard '' Hot 100 . On October 18 , 2011 , Gym Class Heroes released a song entitled " Life Goes On " which features Oh Land . It is the first and only promotional single to be released from '' The Papercut Chronicles II '' . On October 31 , the band released their second single of the album , " Ass Back Home " , featuring Neon Hitch via iTunes . The third single " The Fighter " features Ryan Tedder from OneRepublic and was released on November 8 , 2011 , one week before the album 's release on November 15 . On November 20 , 2011 , Gym Class Heroes performed " Stereo Hearts " with Adam Levine on the American Music Awards of 2011 . The video for the fourth single , " Martyrial Girls " , premiered on Fueled by Ramen 's YouTube channel on August 27 , 2012 . Following the release of the single , the group ceased activity and entered a hiatus
American Music Awards of 2011
American Music Awards of 2011
Gym Class Heroes