"Young Girls" It Was Composed By Mars Philip Lawrence And Ari Levine A Songwriting And Record Production Trio Known As The Smeezingtons As Well As Jeff Bhasker And Emile Haynie With Additional Songwriter Credits By Mac Davis For Mars's Second Studio Album Unorthodox Jukebox 2012 . It Is A Midtempo Doo-Wop-Influenced Pop Ballad That Garnered Comparisons To Mars's "It Will Rain" And Lana Del Rey's Music. Its Instrumentation Includes Drums Synths Piano And Elements Of Electro Music. The Song Was Released As The First Promotional Single And Later As The Fifth Overall Single From Unorthodox Jukebox Being First Serviced To Contemporary Hit Radio In Australia On November 26 2013.