The six-time Grammy nominee - turning 25 this month - posted a video of the moment the 14-month-old toddler recognized her as Ariel the Mermaid ... it 'did not live up to its developed conceit.' ...

In the video shared to her 63.3m followers, Millie oozed high fashion mermaid-core in a dazzling iridescent green dress and a plaited hairstyle to match. Though we unfortunately can’t see much ...