The Under 30 CEO blog notes two benefits to using song. The first is singing can help you solve problems more effectively because it exercises the right side of your brain:
Ever notice how it's easier to rhyme words when you sing them rather than speak them? It's because you've tapped into the pattern recognition power of the right side of the brain. This will make you a more effective problem-solver.
The second technique is to try to memorise the lyrics to a new song. Like memorising other new things, this will boost the level of acetylcholine, which is associated with memory, in your brain.
7 Brain Hacks to Keep Your Mind as Young as Your Body [Under 30 CEO]