My Beautiful Mermaid is the doll from MGA Entertainment. Produced in 2002.
This pretty doll has a lot of things: pink tiara, 2 sea charms, pink skirt, pink hair brush, original box (little tatty).
She sings (melody) when her yellow star is pressed on her body which in turn turns on lights on her mermaid fish tail.
She has plastic sea charms which fit onto her fish tail and the rest can be clicked together to make a bracelet for yourself. These are all kept in a yellow plastic sea charm container. She has rooted blonde hair with parts of her hair changing to pink color when brushed with cold water.