How to find japanese cartoons on youtube?

One day my friend and I were watching Japanese cartoons and I forgot what she searched the cartoon by. I need to find it because I told my friend I would give it to her and I forgot what it was called. All I remember is that there was 3girls that transformed in to fairies or princess or something and they were all different colors when they transformed. I think there was pink, blue and something else.After they transformed, they sang. Please help me find it on YouTube!!!!!