Raise a glass to Madison Beer . The popular singer-songwriter just announced she’ll headline venues all over the globe from May through July on her ‘Locket Tour.’ To close the international run, the New York native will make a stop in her hometown when she takes the stage at New York City’s Madison Square Garden on Monday, July 13. Beer will be joined by special guest Isabel LaRosa for all of her overseas concerts; Thuy and Lulu Simon are scheduled to provide support for her North American gigs