Today’s generous bounty of movie musicals on TCM provides treats virtually all day and all night. Some of the biggest highlights include Marlon Brando and Frank Sinatra in 1955’s Guys and Dolls (pictured) at 5:30 p.m. ET, and Elvis Presley in 1957’s Jailhouse Rock at 3:15 a.m. ET – two generations of teen singing idols, showcased in movies made within two years of one another.