i think it's cool
i sing vibrato too, and sometimes my mouth moves, sometimes it doesn't...depends on the note (for me) and length...
lol i don't get how it annoys people...at least she doesn't do that annoying thing britney spears does...that crackly sound before she sings lower notes...THAT'S annoying...she sounds like The Grudge
(not hating on britney, i still like her)
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"Remember, don't let others dictate your music taste. If you like whatever you're listening to, keep listening to it."