Board Thread:General Discussion/@comment-30450220-20170626021526/@comment-25396609-20170828000151

BMBLB is... sort of a special case right now. While its canonicity is likely in some capacity, the fact of the matter is it was an extra, a late addition to the OST. To my knowledge the only other song that is of that nature currently is not fall in love with you from V3, which Jeff actually wrote long before RWBY came to be.