Noah Kahan made the short trip from his Watertown, MA home to play his “hometown” show at Xfinity Center in Mansfield, MA, this Saturday. Rain poured and abruptly stopped just in time for the show to begin. Despite a wet and muddy lawn, the venue was fully packed. His fan base has been rapidly growing in the last couple of years, going from small venues like Boston’s House of Blues to selling out Xfinity Center with a capacity of 20,000 people. Noah Kahan started the night with “Northern Attitude,” which he coincidentally had written across the back of his jacket, and it strongly resonated with the Boston crowd. The concert-goers were some of the loudest I’ve ever heard, shouting every word to each song as if they wrote it themselves. Kahan made several quips and jokes throughout the night...