The slow rollout of tickets for Taylor Swift’s upcoming North American tour will continue for at least the next couple of weeks. Tickets went on sale for 10 upcoming Swift shows last Friday: Columbus, Ohio; Milwaukee, Wisconsin; Hartford, Connecticut; Knoxville, Tennessee; Louisville, Kentucky; Charlotte, North Carolina; Grand Rapids, Michigan; Portland, Oregon; New Orleans; and Lexington, Kentucky. Information has already trickled out for a few other shows that will go on sale this Friday. Those include Omaha; Buffalo; and Tacom,WA. That will leave just a handful of ticket sales still to come for the tour, which has logged quick sellouts in most of the dozens of markets where tickets have already gone on sale. Swift’s North American trek, featuring NeedToBreathe in the opening slot, gets underway in late May. Her “Speak Now” tour is scheduled to play about 90 shows in 19 countries that span four continents. The tour opened earlier this month in Singapore.