The new Concert Watch feature located in Cortana's Notebook will keep you updated on whether your favorite musicians are playing in a town near you. WP Central writes that all it takes to activate this function is accessing Interests and then adding Music from the list of categories. Concert Watch reportedly uses data from Seat Geek, a ticket search and recommendation engine. It is unknown as to how Concert Watch actually identifies who your most beloved bands are, but WP Central speculates it may be related to Xbox Music. The feature is currently being rolled out, so if it is not present in your version of Cortana, it will likely be soon.