Lucifer says he thinks he'll learn the French horn. Tom Ellis played French horn in the City of Sheffield Youth Orchestra.
Lucifer says that he's "a Louboutin man". This has been shown many times by the soles of his shoes: they are the distinctive red that indicates Louboutin for both male and female.
The title is said by Linda.
When preparing the cocktail with Amenadiel (D.B. Woodside), Lucifer (Tom Ellis) taps the lemon against the cocktail shaker instead of actually juicing it.