<Tr> <Td> "Day After Day" (1971) </Td> <Td> "Baby Blue" (1972) </Td> <Td> "Apple of My Eye" (1973) </Td> </Tr> <P> "Baby Blue" is a song recorded by the band Badfinger for inclusion on their 1971 album, Straight Up . The song was written by Pete Ham, produced by Todd Rundgren, and released on Apple Records . It regained fame four decades later upon being featured in the series finale of AMC's Breaking Bad, which uses the track's title lyric as a reference to the special and iconic blue methamphetamine produced by main character Walter White . </P> <P> Ham wrote the song about a woman named Dixie Armstrong, whom he had dated during Badfinger's last US tour . </P> <P> "Baby Blue" was released as a single in the US on 6 March 1972, in a blue - tinted picture sleeve and featuring a new mix . Because Al Steckler, the head of Apple US, felt that it needed a stronger hook in the opening, he remixed the track with engineer Eddie Kramer in February 1972, applying heavy reverb to the snare during the first verse and middle eight . It was the group's last Top 20 single, peaking at number 14 on the Billboard Pop Singles chart . </P>

Who was the song baby blue written about