For the next single to be taken from his No 1 album In The Lonely Hour, Sam Smith and Luke Monaghan reunite for the promo to I'm Not The Only One, following their collaboration on Leave Your Lover. 

Starring Dianna Agron (Glee) and Chris Messina (The Mindy Project), Luke explores the infidelity theme within Smith's lyric, as a woman is left alone in her palatial home, and the husband goes off to the office...