The Singing Ringing Tree (1957)

A brave prince wants to win the heart of a stubborn princess by finding the singing, ringing tree for her. He finally locates it in the magical realm of an evil dwarf who offers him a deal: he can keep the tree if it starts singing before sundown--which it will only do if the princess truly loves him. Otherwise, he will be turned into a bear. Reminiscent of fairy tales by the Brothers Grimm.