i think Tegan and Sara are performing at all the shows on this tour except for 3 (atleast according to http://civictour.honda.com/)
i ordered tickets to the show here in Nashville, the ticketmaster site didn't mention Tegan and Sara for that show, but i checked the website of the venue, and it says "with specioal guests Tegan and Sara" so i assume they are performing,
anyways, i wonder how long Tegan and Sara's performances will be? i'm not to crazy about them, i hope they will keep the bantering down to a minimum, sence maybe they wont be on for very long