Currently gearing up for some shows in Canada before heading to Europe in August, Nickelback has just confirmed a US tour with 3 Doors Down. The tour will take place August 30th thru September 22nd. Exact dates have not been announced yet, but will once they are 100% confirmed. Also, expect another act to be added to the lineup. In other Nickelback news, the mixing of their upcoming release, Silver Side Up, is complete.