Ottawa's RBC Bluesfest has announced a star-studded lineup for this year, which features Foo Fighters, The Smile, Robert Plant & Alison Krauss, Pitbull, Shania Twain and many more. The annual music festival will take place over nine nights from July 6 to 9 and July 12 to 16 at LeBreton Flats Park in Ottawa, Ontario,…