"Perfect Day" is a song written by American musician Lou Reed in 1972. It was originally featured on Transformer, Reed's second post-Velvet Underground solo album, and as B-side of his major hit, "Walk on the Wild Side". Its fame was given a boost in the 1990s when it was featured in the 1996 film Trainspotting and after a star-studded version was released as a BBC charity single in 1997, reaching number one in the United Kingdom, Ireland, and Norway. Reed re-recorded the song for his 2003 album The Raven.

"Walk on the Wild Side" is a song by American rock musician Lou Reed from his second solo studio album, Transformer (1972). It was produced by David Bowie and Mick Ronson and released as a double A-side with "Perfect Day". Known as a counterculture anthem, the song received wide radio coverage and became Reed's biggest hit and signature song while touching on topics considered taboo at the time, such as transgender people, drugs, male prostitution, and oral sex.