She is cute- although definitely not Rainbow Brite.

Her resemblance to Rainbow Brite and the music she plays seems to suggest she is a knock-off, and a very cute one. WIsh I knew her name!

If you can't find her name around here, you might try this forum that seems to specialize in identifying unknown dolls: http://ghostofthedoll.co.uk/Forum/index.php

Good luck, she is super cute :D