"I assumed it was raoul blurting out what he was thinking, or putting it together...'Christine is gone...with...her...OMG, ANGEL!'"
As CATSNYrevival pointed out, it is Raoul who's saying, "Christine, angel!" and I've always taken it to mean, "Christine, sweetheart!" like he's affectinately calling her "angel."
For me, it's when Julie Covington (on the concept album) misprounounces "descamisados." She says "day-camisados." Really annoys me. Makes me wonder, why didn't anyone correct her? The chorus pronounces it just fine during "Santa Evita."
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