i have a feeling she'll do a world tour or/and add US shows between the time after mexico and her maryland festival show. it doesn't really make sense to me why she'd leave almost a month and a half open between mexico and her last show. i agree that she probably doesn't want to get locked into doing a tour but looking back on past tours she usually takes about a month and a half or so doing a US tour. if that happens she might do a world tour afterwards but just speculating