Watch The Sweetest Christmas (2017) HD Full Movie Free on SolarMovie. Watch The Sweetest Christmas (2017) online free. Kylie is expecting a proposal from her boyfriend/boss at a restaurant and gets a promotion instead. ...Kylie is expecting a proposal from her boyfriend/boss at a restaurant and gets a promotion instead. The restaurant owner is her old high school boyfriend, she hasn't seen in years. They help each other out. Love in the air?