I remember when I was really really young I had a movie that I believe we had bought at a toys R us store. The movie involved unicorns with glowing jewels on their foreheads which they used to communicate with the girls that owned them. I can barely remember the story but I do remember that the title was something like "Princesses something something something and Queen something"

I think?
If you can help me out I would be so happy. Ive been looking for so long for this movie.

Princess Gwenevere and the Jewel Riders | TV Show

Is this any help

Yeah that was it. Actually, funnily enough, I figured it out not too long after I posted this question.