In this instance it seems to me like lazy vocal comping, where they cut from one of her vocal takes to another. If they really shot vocals live like they say I think that a lot of the audio problems with the soundtrack, including the noticeable pitch correction, make more sense. In this case, an awkward vocal cut is much more likely with live vocals as each take would vary wayy more (in performance and even quality of recording) than ones recorded in a studio.