Union J and The Vamps
Episode: 4x01 | Airdate: Dec 15, 2014
Episodes
Union J, Jedward and Harvey
Episode: 4x02 | Airdate: Jan 23, 2015
Rough Copy, Andrew Whyment and Sam Aston
Episode: 4x03 | Airdate: Jan 30, 2015
Ward Thomas and Rachel Riley
Episode: 4x04 | Airdate: Feb 6, 2015
Bars and Melody and Zoella
Episode: 4x05 | Airdate: Feb 13, 2015
Magalie
Episode: 4x06 | Airdate: Feb 20, 2015
Ed Petrie
Episode: 4x07 | Airdate: Feb 27, 2015
Jermain Jackman
Episode: 4x08 | Airdate: Mar 6, 2015
Compilation episode
Episode: 4x09 | Airdate: Mar 13, 2015
Compilation episode
Episode: 4x10 | Airdate: Mar 20, 2015
Compilation episode
Episode: 4x11 | Airdate: Mar 27, 2015