Gwen Stefani celebrated her adoring partner, Blake Shelton, with a special tribute on Father’s Day, June 20. The No Doubt songstress, 51, took to Instagram in the final hours of Father’s Day to celebrate her country crooner, 45, and his relationship with her three sons — Kingston Rossdale, 15, Zuma Nesta Rock Rossdale, 12, and Apollo Bowie Flynn Rossdale, 7.