Question: Which Twenty Million Sweethearts actress was widely known for performing in RKO's musical films?
Context: Mari Kim () is a South Korean contemporary artist and animator from Seoul, South Korea.  She is known for the big-eyed, cartoon-like female characters in her pop art paintings, called "eyedolls".  Her work was popularly recognized after her 2011 collaboration with the K-pop girl group 2NE1, directing the animated music video for their single "Hate You".  The single topped charts and the music video, with eyedoll action heroines portraying each of the four members, received over twenty million YouTube views. Ginger Rogers (born Virginia Katherine McMath; July 16, 1911 – April 25, 1995) was an American actress, dancer, and singer, widely known for performing in films and RKO's musical films, partnered with Fred Astaire.  She appeared on stage, as well as on radio and television, throughout much of the 20th century. Kevin Godec (born August 17, 1987), better known by his alias Purge or PurgeGamers, is an American ex-professional "Dota 2" player, entertainer and caster.  He has been an official part of every "DotA 2" International since 2012 and is widely regarded as the best known educator for the title.  He is the co-star of "Purge Coaches Day9", a popular collaborative Twitch series with former professional "Starcraft" player and variety streamer Day9, and has accrued over one hundred and twenty million plays on YouTube for his educational content. Twenty Million Sweethearts is a 1934 American Pre-Code musical comedy film directed by Ray Enright.  The film stars Pat O'Brien, Dick Powell and Ginger Rogers.  It also featured The Mills Brothers.  The film was remade in 1949, starring Doris Day and Jack Carson, as "My Dream Is Yours". The National Legion of Decency, also known as the Catholic Legion of Decency, was founded in 1933 as an organization dedicated to identifying and combating objectionable content in motion pictures from the point of view of the American Catholic Church.  After receiving a stamp of approval from the secular offices behind Hollywood's Production Code, films during this time period were then submitted to the National Legion of Decency to be reviewed prior to their official duplication and distribution to the general public.  Condemnation by the Legion would shake a film's core for success because it meant the population of Catholics, some twenty million strong at the time, were theoretically forbidden from attending any screening of the film under pain of mortal sin.  The efforts to help parishioners avoid films with objectional content backfired when it was found that it helped promote those films in heavily Catholic neighborhoods among Catholics who may have seen the listing as a suggestion.  Although the Legion was often envisioned as a bureaucratic arm of the Catholic Church, it instead was little more than a loose confederation of local organizations, with each diocese appointing a local Legion director, usually a parish priest, who was responsible for Legion activities in that diocese. Aakash Gandhi is an American composer, pianist, songwriter, and entrepreneur who is currently based in Mumbai, India.  He is widely known for his musical arrangements which blend piano and world elements to create largely instrumental and acoustic works.  He has amassed over twenty million views through his music channel, 88 Keys To Euphoria on the social platform, YouTube. Madurai Medical College is a medical school attached to the Government Rajaji Hospital in Madurai, Tamil Nadu, India.  The hospital provides tertiary care to more than twenty million people in the southern part of Tamil Nadu.  The hospital was established in 1842 and became a teaching hospital in 1954.  The hospital was formerly known as Erskine's Hospital. Pedro Maia (born May 3, 2002), better known by the stage name MC Pedrinho is a Brazilian singer, nationally known for the song "Dom Dom Dom", which has more than twenty million views in their official video.  Pedrinho is nationally known for singing songs with sexual lyrics, considered unsuitable for his age.  His songs have experienced an attempted ban by prosecutors within the national territory. Government Rajaji Hospital is situated in Madurai, Tamil Nadu, India.  The hospital provides tertiary care to more than twenty million people in the southern part of Tamil Nadu.  The hospital was formerly known as Erskines Hospital.  The hospital was established in 1842 and was taken over by the municipality of Madurai in 1872 and the state administration took over in 1918 and became a teaching hospital in 1954.  The area of the hospital is 12.47 acre (Plinth area 1,04,358 Sq.ft).  Bed strength of the hospital is 2,518.  Madurai Medical College is a medical school attached to the Government Rajaji Hospital in Madurai, Tamil Nadu, India.  It is most busiest hospital in state of Tamil Nadu also it is the only hospital in the State to have doctors available 24x7 in all speciality departments . Benyamin Bahadori (Persian: بنیامین بهادری‎ ‎ ) is an Iranian Pop singer, composer and songwriter from Tehran, Iran.  His first album "85" released in 2006, was a massive commercial success within Iran and with the Iranian diaspora abroad.  Also known as Benyamin and his stage name is Benyamin.  He is one of the most popular pop singers in Iran.  Benyamin has released four studio albums and numerous singles so far.  He also sang sound tracks for the Movies "Gorgo Mish" and "A Few Cubic Meters of Love" ("Chand Metr Moka'ab Eshgh").  In 2007, a BBC documentary called "Rageh Inside Iran" described him as a "Big Star of Iran" who had sold twenty million copies of his album at the beginning of his career.  Although basically a pop singer, Benyamin often includes elements of hip hop (Biya Ashegham kon) and rap (Kojaye Donyai) into his music and some of the songs in his latest album "94" have English lyrics.  Benyamin is also known as "Aghae Eshgh" or "Mr. Love" among his fans because his songs are mostly centered on romantic themes.
Answer: Ginger Rogers