Question: Getting Gertie's Garter is a 1945 American slapstick comedy film written and directed by Allan Dwan, and starring Dennis O'Keefe, Barry Sullivan and Marie McDonald, an American singer and actress known as "The Body Beautiful" and later nicknamed what?

Context paragraphs:
Caveman (film): Caveman is a 1981 American slapstick comedy film written and directed by Carl Gottlieb and starring Ringo Starr, Dennis Quaid, Shelley Long and Barbara Bach.

The Habit of Happiness: The Habit of Happiness is a 1916 American silent comedy film directed by Allan Dwan and filmed by cinematographer Victor Fleming.  The film was written by Allan Dwan and Shannon Fife from a suggestion by D. W. Griffith and stars Douglas Fairbanks.  A 16mm print of the film is preserved in a private collection.

The Conspiracy (1914 film): The Conspiracy is a 1914 American drama silent film directed by Allan Dwan and written by Robert M. Baker, Allan Dwan and John Emerson.  The film stars John Emerson, Lois Meredith, Harold Lockwood, Iva Shepard, Francis Byrne and Hal Clarendon.  The film was released on December 10, 1914, by Paramount Pictures.

The Unlawful Trade: The Unlawful Trade is a 1914 American silent short drama film directed by Allan Dwan and starring Pauline Bush, William Lloyd, George Cooper, and Lon Chaney.  George Cooper and directed Allan Dwan also wrote the script.  The film is now considered lost.

Abroad with Two Yanks: Abroad with Two Yanks is a 1944 American comedy film directed by Allan Dwan and starring Helen Walker, William Bendix and Dennis O'Keefe as the title characters.  It was Bendix's third and final role in a film as a US Marine and the first of Dwan's three films about the United States Marine Corps.

15 Maiden Lane: 15 Maiden Lane is a 1936 American crime film directed by Allan Dwan and starring Claire Trevor and Cesar Romero, with Lloyd Nolan.  The plot involves an insurance investigator (Trevor) who infiltrates a gang who had stolen jewels from the eponymous building on Maiden Lane in the Fulton Street District of Manhattan.  The neighborhood had been the center of New York City's Diamond District since the 19th century before its gradual relocation uptown to 47th Street after World War II.  The Museum of Modern Art in New York City screened a restored print of the film in June 2013 as part of an Allan Dwan retrospective.

Getting Gertie's Garter: Getting Gertie's Garter is a 1945 American slapstick comedy film written and directed by Allan Dwan, and starring Dennis O'Keefe, Marie McDonald, and Barry Sullivan.  The film is based on the 1921 play of the same name by Wilson Collison and Avery Hopwood.  The play was previously adapted for the screen as a silent film released in 1927 by Metropolitan Pictures and starred Marie Prevost and Charles Ray.

Up in Mabel's Room (1944 film): Up in Mabel's Room is a 1944 American comedy film directed by Allan Dwan, based on the 1919 play by Wilson Collison and Otto A. Harbach, and starring Marjorie Reynolds, Dennis O'Keefe and Gail Patrick.  The film's composer, Edward Paul, was nominated for an Academy Award for Best Original Score in 1945.

The Unwelcome Mrs. Hatch: The Unwelcome Mrs. Hatch is a 1914 American drama film directed by Allan Dwan and written by Allan Dwan and Mrs. Burton Harrison.  The film stars Henrietta Crosman, Walter Craven, Lorraine Huling, Minna Gale and Harold Lockwood.  The film was released on September 10, 1914, by Paramount Pictures.

Marie McDonald: Marie McDonald (July 6, 1923 – October 21, 1965) was an American singer and actress known as "The Body Beautiful" and later nicknamed "The Body".

Supporting paragraphs: Getting Gertie's Garter Marie McDonald
Answer: "The Body"