Musical Master, "Me and My Baby" would've worked perfectly. All the remaining songs well with the "Roxie's POV" format, except for "Mr. Cellophane." The movie tries to justify it by showing Roxie looking at Amos looking all forlorn, as the paddy wagon drives away from the hospital. Her POV of Amos is the last thing we see before "Mr. Cellophane" commences. I've always felt they should've kept "Me and My Baby" and dropped "Mr. Cellophane," because the former is actually from Roxie's POV and covers all the hoopla (i.e. Billy bribing the doctor to lie about Roxie's pregnancy and Amos trying to get noticed by shouting "I'm the father! That's my kid"), but I guess they wanted to keep Amos' one and only song, because the principal characters -- Velma, Roxie, Billy, Mama -- all get at least one big number. Granted, the song is pivotal on stage and humanizes Amos, who up to that point has only been seen as a bumbling cuckold, but it just doesn't work with the format of the film.
Salve, Regina, Mater misericordiae
Vita, dulcedo, et spes nostra
Salve, Salve Regina
Ad te clamamus exsules filii Eva
Ad te suspiramus, gementes et flentes
O clemens O pia