In the ongoing race to predict the next teen craze, give yourself 10 points if you had … Celtic/Latin/jazz fusion fiddle?

Hey, in a world where Lindsey Stirling has made the violin commercial again, anything can happen. And just one listen to First Light, the debut album from 18-year-old Ontario wunderkind Mary Frances Leahy, will convince you that she’s next in line. Its nine original instrumentals are ironclad proof that...