Question: Which american entertainer, known for his dedication to fundraising and charity, made his debut at the Copacabana?
Context: Jennifer Lopez is an American entertainer who has recorded songs in English and Spanish.  In addition to recording material for her seven studio albums and two compilation albums, she has also contributed music to film soundtracks, charity records and television advertisements and has collaborated with other recording artists on their respective albums.  Lopez, who began her career in musical theater, re-entered the music scene upon her portrayal of the title role in the Selena biopic of the same name (1997).  The role inspired her to launch a career in music.  She then recorded a demo in Spanish and her manager Benny Medina sent it the Work Group, who showed an interest in signing her.  Tommy Mottola, the head of the label, advised her to sing in English instead. Jared Leto is an American entertainer who has had an extensive career in film, music, and television.  He made his debut with minor roles in the television shows "Camp Wilder" (1992) and "Almost Home" (1993).  He achieved recognition in 1994 for his role as Jordan Catalano in the teen drama television series "My So-Called Life".  The show was praised for its portrayal of adolescence and gained a cult following, despite being canceled after only one season.  The same year, he made his television film debut starring alongside Alicia Silverstone in "Cool and the Crazy".  Leto's first film role was in the 1995 drama "How to Make an American Quilt".  He later co-starred with Christina Ricci in "The Last of the High Kings" (1996) and received a supporting role in "Switchback" (1997).  In 1997, Leto starred in the biopic "Prefontaine" in which he played the role of Olympic hopeful Steve Prefontaine.  His portrayal received positive reviews from critics and is often considered his breakthrough role.  The following year, Leto starred together with Alicia Witt in the horror "Urban Legend".  He then acted alongside Sean Penn and Adrien Brody in the war film "The Thin Red Line" (1998).  After playing supporting roles in "Black and White" and "Girl, Interrupted", Leto portrayed Angel Face in "Fight Club" (1999), which has since became a cult film. American entertainer Usher has released six video albums and appeared in forty-one music videos, eleven films, nine television programs, and four commercials.  Usher released his debut single, "Call Me a Mack" in 1993 from the soundtrack "Poetic Justice".  Directed by Bille Woodruff, Usher appeared in the video for "You Make Me Wanna...", the lead single from his break-through album "My Way" (1997).  The video shows Usher flanked by four dancers, to which the scene is then replaced by five clones of Usher performing dance routines around chairs.  The latter song was sung by the singer on the sitcom "Moesha", where he made his television debut.  Usher appeared in four episodes for the show, portraying his character, Jeremy Davis. " Live" (1999) was released to keep Usher's fans satisfied during his four-year break between "My Way" and "8701" (2001).  The video album version was certified gold by the Recording Industry Association of America (RIAA), denoting shipments of 50,000 units.  During his musical break, he made his film debut in the 1998 science fiction horror film "The Faculty", which received mixed reviews, but was a box office success.  Following this, he starred in three films: "She's All That" (1999), "Light It Up" (1999) and "Texas Rangers" (2000). Amos Muzyad Yakhoob Kairouz (January 6, 1912 – February 6, 1991), known professionally by his stage name Danny Thomas, was an American nightclub comedian, singer, actor, and producer, whose career spanned five decades.  He created and starred in one of the most successful and long running situation comedies in the history of American network television.  In addition to guest roles on many of the comedy, talk and musical variety programs of his time, his legacy includes a lifelong dedication to fundraising for charity. American entertainer Jennifer Lopez has appeared in many motion pictures and television programs.  She is one of the highest paid actresses in Hollywood and is the highest paid actress of Latin descent, making up to US$15 million per film role.  She is also the richest actress in Hollywood, with an estimated net worth of $320 million (as of 2014).  Lopez made her acting debut at age 16 with a small role in the 1986 film "My Little Girl".  From there, she received her first high-profile job in 1991 as a Fly Girl dancer on the television comedy program "In Living Color".  Following her departure from the show in 1993, Lopez made several guest appearances in the television series "South Central", appeared in the made-for-television movie "Lost in the Wild" (1993) and starred as Melinda Lopez in the television series "Second Chances" (1993) and its spin-off "Hotel Malibu" (1994).  "Second Chances" and "Hotel Malibu" ran for only a brief period, receiving negative reviews.  Lopez's first major film role came in the 1995 motion picture "Money Train", alongside Wesley Snipes and Woody Harrelson.  The film faced negative reviews and is considered to be a box office bomb.  Her next two film roles in "Jack" (1996) and "Blood and Wine" (1997) were received similarly; however, critics were divided by the latter.  Lopez received her first leading role in the Selena biopic of the same name in 1997.  The film was a commercial and critical success and is often cited by critics as her breakout role.  Later that year, Lopez starred as Terri Flores in the film "Anaconda", which garnered negative reviews by critics despite being a box office success.  In 1998, Lopez starred alongside George Clooney in the crime film "Out of Sight" (1998).  The film met with positive reviews and was a box office success.  In the same year, she also lent her voice to the animated film "Antz". The English singer and songwriter Gary Barlow has recorded songs for three solo studio albums, a joint album and has also collaborated with other artists on their respective singles.  In 1996, Take That, a boy band consisted of five members, including Barlow, disbanded after 6 years recording music together.  Three months after the release of their then-final single, the singer launched his solo debut song, "Forever Love"; it was written solely by Barlow and featured more mature sound than the work previously released by Take That.  The single has been succeeded by Barlow's 1997 debut studio album, "Open Road", a primary pop and blue-eyed soul oriented record.  It was mainly written and composed by Barlow himself, however, he listed some songwriters in the penning process.  American entertainer Madonna and producer Shep Pettibone wrote "Love Won't Wait" for the album, although it was originally planned for a Madonna project which she later abandoned.  Barlow worked with American songwriter Dianne Warren with whom he co-wrote the song "My Commitment" for the album.  Howard Perdew and Andy Spooner wrote "So Help Me Girl", a single for which Barlow recorded a Spanish language version titled "Ayúdame" (English: "Help Me"). Robert Hanley (born June 17, 1947), also known as Broadway Bob.  and Bob Hanley, is an American actor, entertainer, comedian, singer, and writer.  Hanley has been cast in over 100 starring and co-starring roles in television variety, comedy and drama series including "Crazy Like a Fox" with Jack Warden, and "Pros & Cons" with James Earl Jones and Richard Crenna.  Hanley hosted television game shows for the ABC and CBS networks, and, as stand-up comedian Broadway Bob, appeared on "The Merv Griffin Show".  He headed the Robert Hanley Actors Studio for eighteen years.  Currently, as a singer/entertainer with his own seventeen-piece orchestra, he performs at civic and fundraising events.  He is the founder of the nonprofit Entertainment Fellowship. American entertainer Madonna has worked in twenty-six feature films (twenty-one as an actress), nine short films, three theatrical plays, ten television episodes, and sixteen commercials.  In 1979, she made her acting debut in the low-budget feature, "A Certain Sacrifice".  Its commercial release in 1985 coincided with the success of her second studio album, "Like a Virgin".  That same year, she made a cameo appearance as a club singer in the film "Vision Quest"; she also garnered commercial and critical success for the title role in Susan Seidelman's "Desperately Seeking Susan".  Madonna followed it with a leading role in the adventure drama, "Shanghai Surprise" (1986), with her then-husband actor Sean Penn.  The film was panned by critics, and Madonna received her first Golden Raspberry Award for Worst Actress.  Her next films such as "Who's That Girl" (1987) and "Bloodhounds of Broadway" (1989) were critical and commercial failures.  In 1986, she made her theatrical debut in David Rabe's "Goose and Tom-Tom" and her first commercial for Mitsubishi in Japan.  She starred in the 1989 commercial for Pepsi-Cola alongside her song "Like a Prayer".  Due to the controversy surrounding the song's music video, the commercial was revoked and her contract with Pepsi-Cola was cancelled. Save the Rhino International (SRI), a UK-based conservation charity, is Europe’s largest single-species rhino charity, in terms of funds raised and grants made, and in terms of profile and positioning.  They began fundraising for in situ rhino conservation projects in 1992 and were formally registered as a charity (number 1035072) in 1994.  One of SRI's founder patrons was the British writer and humorist Douglas Adams, who was also known to be a conservation movement enthusiast. The Copacabana is a New York City nightclub.  Many entertainers such as Danny Thomas, Pat Cooper and the comedy team of Martin and Lewis, made their New York debuts at the Copacabana.  The Barry Manilow song "Copacabana" (1978) is named after the club.
Answer: Danny Thomas