This musical reworking of Too Many Husbands (1940), features Grable as a top singer and dancer who's been widowed by WW II. She marries her late husband's songwriting partner, Gower Champion, but the new marriage is thrown for a loop when Lemmon, her first husband, turns up very much alive and eager to see Grable.

Lorelei Lee is a beautiful showgirl engaged to be married to the wealthy Gus Esmond, much to the disapproval of Gus' rich father, Esmond Sr., who thinks that Lorelei is just after his money. When Lorelei goes on a cruise accompanied only by her best friend, Dorothy Shaw, Esmond Sr. hires Ernie Malone, a private detective, to follow her and report any questionable behavior that would disqualify her from the marriage.