Credits and personnel
Who mastered the song "It Will Rain"?
It Will Rain
 Recording Engineered at: Levcon Studios in Los Angeles, California; mixed at Larrabee Sound Studios in North Hollywood, California. Personnel Songwriting – Ari Levine, Bruno Mars, Philip Lawrence  Production – The Smeezingtons Engineer – Ari Levine Arrangement by (string arrangement)– Phredley Brown Mixing – Manny Marroquin   Mixed By (assisted by)– Chris Galland, Erik Madrid Mastering – David Kutch  Bass– Oscar Hidalgo Conductor– Suzie Katayama Viola– Andrew Duckles Violin– Charlie Bisharat, Josefina Vergara