The elevator drops off "The Saint of Killers" on Floor -9, as in the Ninth Circle of Hell, as mentioned in the Inferno, a poem written by Dante Alighieri, a Renaissance Italian poet.
In the scene where young Jesse is kissing young Sabina, she turns on the music player. The song playing is called 'This Is The First' by Audio Republic, a Leeds, West Yorkshire, England based band. The song was written by Phill Clarke who is also singing the vocals.