What is the accent of Mother Gothel in the movie Tangled?
In an interview with the voice actor (see here), she has a pretty neutral American accent (GenAm + father-bother + caught/cot, from what I tell), but she switches to an almost mid-Atlantic pronunciation for the character. Is this a mid-Atlantic accent? I think I've heard this type of pronunciation among storytellers in movies: It gives them a fanciful, but not posh, sound.
Here's an example of just the (as of now) unidentified accent, song.
Update: In contrast to the mid-Atlantic accent, Mother Gothel uses [iɐ] and [eɐ ~ ɛɐ], not [ɪə] nor [ɛə].