The actress from the 30's who died in a plane crash that Gus says Mickey looks like, could be Carole Lombard. She was an actress who died in 1942 in a plane crash.
The song played in the end of the episode is "Beautiful by Clem Snide"
During the scene where Mickey and Gus are in the bedroom discussing drugs, the song playing faintly in the background is "I Want to See the Bright Lights Tonight" by Richard and Linda Thompson.