Meet Me in St. Louis is a musical film made by Metro-Goldwyn-Mayer and released in 1944.
 Divided into a series of seasonal vignettes, starting with Summer 1903, it relates the story of a year in the life of the Smith family in St. Louis, leading up to the opening of the Louisiana Purchase Exposition (more commonly referred to as the World's Fair) in the spring of 1904.
 The picture stars Judy Garland, Margaret O'Brien, Mary Astor, Lucille Bremer, Tom Drake, Leon Ames, Marjorie Main, June Lockhart, and Joan Carroll.
The Boy Next Door is a 2015 American erotic thriller film directed by Rob Cohen and written by Barbara Curry.
 The film stars Jennifer Lopez, Ryan Guzman, and Ian Nelson, with John Corbett and Kristin Chenoweth playing supporting roles.
 Lopez plays a high school teacher named Claire who, in the midst of being separated from her husband (Corbett), has a one-night stand with a younger neighbor (Guzman), who develops a dangerous obsession with her.
"Boy Next Door" is the fifth single from British R&B artist Jamelia and the fourth and final single from her debut album "Drama".
 "Boy Next Door" is Jamelia's smallest hit, missing the UK Top 40, peaking at #42 and spending only two weeks inside the Top 75.
 The version released as a single was a slight remix to the version that appears on the album and is also slightly shorter in length.
Boy Meets Girl is a 2004 chick lit novel by American author Meg Cabot.
 The book was initially published under the name Meggin Cabot in January 2004 through HarperCollins Publishers, with subsequent reprintings of "Boy Meets Girl" using the "Meg Cabot" nom de plume.
 "Boy Meets Girl" is the second book in the "Boy" series, but is only loosely connected to its predecessor "The Boy Next Door".
"The Boy Next Door" is a 1944 popular song by Hugh Martin and Ralph Blane.
 It was introduced in the musical film "Meet Me in St. Louis," where it was performed by Judy Garland.
 In 1954 Vic Damone sang it in the first minutes of the film Athena.
 It has subsequently become a popular standard, performed by many artists.
Hugh Martin (August 11, 1914 – March 11, 2011) was an American musical theater and film composer, arranger, vocal coach, and playwright.
 He was best known for his score for the 1944 MGM musical "Meet Me In St. Louis", in which Judy Garland sang three Martin songs, "The Boy Next Door," "The Trolley Song," and "Have Yourself a Merry Little Christmas."
 The last of these has become a Christmas season standard in the United States and around the English-speaking world.
 Martin became a close friend of Garland and was her accompanist at many of her concert performances in the 1950s, including her appearances at the Palace Theater.
The boy next door is an archetype of storytelling.
 He is often invoked in Western contexts to indicate wholesome, unassuming, or "average" masculinity.
 A boy next door may serve as a love interest for a female protagonist who lives near by.
Maachis ("Matches") is a 1996 Indian Hindi film directed by Gulzar and produced by R. V. Pandit.
 The film stars Om Puri, Tabu, Chandrachur Singh and Jimmy Shergill in the lead roles.
 The title of the film is used as a metaphor that conveys that the youth of any nation are matchsticks that could get ignited due to the deficiencies in the political and policing systems.
 The film portrays the circumstances surrounding the rise of the Sikh insurgency in Punjab in the 1980s and traces the transformation of a youth from a boy next door to a dreaded terrorist bent on wreaking vengeance.
Fire!
 (ファイヤー!
 , Faiyā! )
 is a shōjo manga series by Hideko Mizuno about the rise and fall of an American rock star named Aaron.
 It was serialised in "Seventeen" from 1969–1971 and won the 1970 Shogakukan Manga Award.
 The hedonistic Aaron is neither a 'boy next door' character, nor a 'shining prince', and Sandra Buckley states that it was his 'non-conventional, rebellious behavior' that was part of the attraction for the fans of "Fire!"
.
 It was innovative for shōjo manga by having the first sexually explicit scenes in post-World War II manga, and by having a male protagonist.
 The story has been read as a "conservative morality tale", but Buckley states that this ignores the two-year run of readers following Aaron's exploits avidly.
 There are accounts of teenage girls queueing for the next issue to come out.
"Ten Commandments" is a song by Lil' Mo featuring Grammy Award–winning female rapper Lil' Kim from the former's sophomore effort, "Meet the Girl Next Door" (2003).
 Although Elektra Records had announced in December 2002 that the song would be released as "Meet the Girl Next Door"<nowiki>'</nowiki>s second single, plans for the release never followed resulting in a promotional "street" release a month prior to the release of "Meet the Girl Next Door".

Question: "The Boy Next Door" is a popular song in a musical film about what family?
Answer: Smith