Watch The Sweetest Heart (2018) HD Full Movie Free on solarmovie.do. Watch The Sweetest Heart (2018) online free. Maddie (Julie Gonzalo), who owns a cupcake business, gets help from an investment banker, but a pote...Maddie (Julie Gonzalo), who owns a cupcake business, gets help from an investment banker, but a potential new romance between them is complicated by the unexpected return of her first love, Nate.