Question: Who hosted "The Toast of the Town" and also featured guest performer Sandy Stewart?

full_context: Document 1: Milton Berle: Milton Berle (born Mendel Berlinger; July 12, 1908 – March 27, 2002) was an American comedian and actor. As the host of NBC's "Texaco Star Theater" (1948–55), he was the first major American television star and was known to millions of viewers as "Uncle Miltie" and "Mr. Television" during TV's golden age.
Document 2: Sandy Stewart (singer): Sandy Stewart (born Sandra Galitz on July 10, 1937) is an American singer of popular songs. She was a regular guest on 1950s and 1960s TV variety programs including shows hosted by Ed Sullivan, Bing Crosby, and Eddie Fisher. During the 1961-63 television seasons, she was a regular on NBC'S The Perry Como Show as part of The Kraft Music Hall Players along with Don Adams, Kaye Ballard and Paul Lynde.
Document 3: Johnny Carson: John William Carson (October 23, 1925 – January 23, 2005) was an American talk show host and comedian, best known for his 30 years as host of "The Tonight Show Starring Johnny Carson" (1962–1992). Carson received six Emmy Awards, the Television Academy's 1980 Governor's Award, and a 1985 Peabody Award. He was inducted into the Television Academy Hall of Fame in 1987. Carson was awarded the Presidential Medal of Freedom in 1992 and received a Kennedy Center Honor in 1993.
Document 4: Ed McMahon: Edward Leo Peter McMahon Jr. (March 6, 1923 – June 23, 2009) was an American comedian, actor, singer, game show host and announcer. He is most famous for his thirty year run on NBC television as Johnny Carson's sidekick, announcer and second banana on "The Tonight Show" from 1962 through 1992 and on Carson's earlier ABC game show "Who Do You Trust?" He also hosted the original "Star Search" from 1983 to 1995. He co-hosted "TV's Bloopers & Practical Jokes" with Dick Clark from 1982 to 1998. He also presented sweepstakes for the direct marketing company American Family Publishers (not, as is commonly believed, its main rival Publishers Clearing House).
Document 5: Sandy Stewart (musician): Sandy Stewart (born on January 13, 1958 in San Francisco) is a songwriter, singer and keyboardist from Houston, Texas, USA. She is mostly known for her album "Cat Dancer", and her association with Fleetwood Mac vocalist and solo act Stevie Nicks. Sandy's first single, "Saddest Victory" was released in 1983. Its video played on MTV for several weeks, but the song never charted. Sandy and Stevie Nicks also sang a duet for the song "I Pretend", which also was featured on "Cat Dancer". A 12" single was also released to promote "Cat Dancer". The single featured a large close-up photo of Sandy on its album cover.
Document 6: Carol Burnett: Carol Creighton Burnett (born April 26, 1933) is an American actress, comedienne, singer and writer, whose career spans six decades of television. She is best known for her long-running TV variety show, "The Carol Burnett Show", originally aired on CBS. She has achieved success on stage, television and film in varying genres including dramatic and comedy roles. She also has appeared on various talk shows and as a panelist on game shows.
Document 7: The Eddie Fisher Show: The Eddie Fisher Show was an American musical comedy/variety television series starring Eddie Fisher and his then wife Debbie Reynolds. Other series regulars included George Gobel, Gisele MacKenzie and Mary Tyler Moore. The series alternated on Tuesday nights with "The George Gobel Show" with episodes running from October 1, 1957–March 17, 1959 on NBC.
Document 8: Perry Como: Pierino Ronald "Perry" Como (May 18, 1912 – May 12, 2001) was an American singer and television personality. During a career spanning more than half a century, he recorded exclusively for RCA Victor for 44 years after signing with the label in 1943. "Mr. C.", as he was nicknamed, sold millions of records for RCA and pioneered a musical variety television show. Como was seen weekly on television from 1948 to 1963, then continued hosting the "Kraft Music Hall" variety program monthly until 1967. His television shows and seasonal specials were broadcast throughout the world. Also a popular recording artist, Perry Como released numerous hit records from the 1940s through the 1970s. Como's appeal spanned generations and he was universally respected for both his professional standards and the conduct in his personal life.
Document 9: David Letterman: David Michael Letterman (born April 12, 1947) is an American television host, comedian, writer, and producer. He hosted a late night television talk show for 33 years, beginning with the February 1, 1982 debut of "Late Night with David Letterman" on NBC, and ending with the May 20, 2015 broadcast of "Late Show with David Letterman" on CBS. In total, Letterman hosted 6,028 episodes of "Late Night" and "Late Show", surpassing friend and mentor Johnny Carson as the longest-serving late night talk show host in American television history. In 1996 Letterman was ranked 45th on "TV Guide"' s 50 Greatest TV Stars of All Time.
Document 10: Gale Sherwood: Gale Sherwood (born March 4, 1929) was a Canadian singer and actress, born Jacqueline Nash, who is best known as the singing partner of Nelson Eddy from 1953 until his death in 1967.
Document 11: Late Show (CBS TV series): The Late Show is an American late-night television talk and variety show on CBS. It first aired in August 1993 with host David Letterman, who previously hosted "Late Night with David Letterman" on NBC from 1982 to 1993. Letterman's iteration of the program ran until his retirement on May 20, 2015. Comedian Stephen Colbert, best known for his roles on Comedy Central programs "The Daily Show" and "The Colbert Report", assumed hosting duties in September. The show originates from the Ed Sullivan Theater in the Theater District of Manhattan, New York, and airs live to tape in most U.S. markets at 11:35 p.m. Eastern and Pacific, 10:35 in the Central and Mountain time zones.
Document 12: Ed Sullivan: Edward Vincent Sullivan (September 28, 1901 – October 13, 1974) was an American television personality, sports and entertainment reporter, and longtime syndicated columnist for the "New York Daily News" and the Chicago Tribune New York News Syndicate. He is principally remembered as the creator and host of the television variety program "The Toast of the Town", later popularly—and, eventually, officially—renamed "The Ed Sullivan Show". Broadcast for 23 years from 1948 to 1971, it set a record as the longest-running variety show in US broadcast history. "It was, by almost any measure, the last great TV show," proclaimed television critic David Hinckley. "It's one of our fondest, dearest pop culture memories."
Document 13: Steve Lawrence: Steven Lawrence (born July 8, 1935) is an American singer and actor, best known as a member of a duo with his wife Eydie Gormé, billed as "Steve and Eydie." The two appeared together since appearing regularly on "Tonight Starring Steve Allen" in the mid-1950s until Gormé's retirement in 2009.
Document 14: Dinah Shore: Dinah Shore (born Fannye Rose Shore; February 29, 1916 – February 24, 1994) was an American singer, actress, and television personality, and the top-charting female vocalist of the 1940s. She rose to prominence as a recording artist during the Big Band era, but achieved even greater success a decade later, in television, mainly as hostess of a series of variety programs for Chevrolet.
Document 15: Sandi Patty: Sandra Faye "Sandi" Patty (born July 12, 1956) is an American Christian music singer, known for her wide vocal range and expressive flexibility which has led music critics to dub her "The Voice".
ground_truth: Ed Sullivan