I know the frustration when you see a movie and find the song is not on the actual soundtrack. I would say this one is going to be tough to guess without hearing a sample, do you have a video clip or an audio sample you can upload?
Was it an actual pop song with lyrics? or was it an orchestral music?
# King of the Road" # "Candida" # "Cochise" # "Hard-Core Troubadour" # "Kickstart My Heart" # "Lit Up" # "Gimme Three Steps" # "Only Daddy That'll Walk the Line" # "Locomotivelung" # "Segment" # "Vedrai Carino" # "Shipwrecked Sailor" # "Holy Roller Novocaine" # "Paint it Black (Marie Douceur, Marie Colre)" # "Walking Bum" # "I Feel Alright" # "Valentine's Day" # "Starting Line" # "Faithfully" # "Symphony No. 102 in B Flat Major" # "Space Lord" # "Click Click Boom" # "The Gambler" # "T.N.T." # "Desperate Cry" # "Bad Case of Lovin' You" # "Inner Self" # "We Belong" # "Guaranteed Cool" # "Last Dance" # "The Edge of the Switchblade" # "Wake Me Up Before You Go-Go" # "Gentle on My Mind" # "Goodbye Cowboy"