SF Gate reports that all fans of Donald Glover?s musical alter ego Childish Gambino will be able to watch his highly anticipated new film premiere this weekend. Amazon announced on Wednesday that Glover's mysterious new project ?Guava Island,? will stream for free at www.amazon.com/guavaisland for the first 18 hours after its debut Saturday, April 13 at 12:01 a.m. PST and then will only be available to Amazon Prime Video subscribers after the 18-hour window closes. The movie will also be shown one time only at Twitch.tv/primevideo at 5 p.m. PST on Saturday.