It’s a plane that’ll certainly prove a challenge on the de-icing pad. Calgary-based airline WestJet unveiled their newest custom-painted aircraft Sunday, inspired by the hit Disney animated film Frozen. Toiling in a Fort Worth, Tx. hangar for 21 days straight, teams of painters and artists worked gruelling 12-hour shifts to magically transform a six-year-old Boeing 737-800 into a striking piece of aviation artistry. Arriving under the cover of darkness at Toronto’s Pearson Ai