Taylor Swift has added another concert at Gillette Stadium, near Boston, after tickets for her Speak Now 2011 tour sold out within five minutes late last week. She also added two more dates for the Staples Center in Los Angeles after two shows there sold out within two minutes. The new date at Gillette Stadium will be June 26, with tickets on sale Saturday (Dec. 11). The new L.A. dates will be Aug. 27-28, with tickets on sale Friday (Dec. 10).