No Doubt Reunion-Almost 100% confirmed. I talked to Gwen last week, they have been approached and they are finishing up work on their latest with a spring to summer release.
The White Stripes-They will finish touring through December and take a break until Coachella.
The Smashing Pumpkins-They will be touring straight through and headline the third night.
Other confirmed acts.
Tegan and Sarah
This is "as of now". Things can change but so far it's solid.