The 4th Emmy Awards, retroactively known as the 4th Primetime Emmy Awards after the debut of the Daytime Emmy Awards, were presented at the Cocoanut Grove in Los Angeles, California on February 18, 1952.
 The ceremonies were hosted by Lucille Ball and Desi Arnaz.
The 25th Emmy Awards, later known as the 25th Primetime Emmy Awards, were handed out on May 20, 1973.
 The ceremony was hosted by Johnny Carson.
 This would be the final ceremony that included daytime categories, as the Daytime Emmy Awards premiered the next year.
 Winners are listed in bold and series' networks are in parentheses.
The 20th Emmy Awards, later known as the 20th Primetime Emmy Awards, were handed out in May 19, 1968.
 The ceremony was hosted by Frank Sinatra and Dick Van Dyke.
 Winners are listed in bold and series' networks are in parentheses.
The 27th Emmy Awards, later known as the 27th Primetime Emmy Awards, were handed out on May 19, 1975.
 There was no host this year.
 Winners are listed in bold and series' networks are in parentheses.
Joseph Abraham Gottlieb (February 3, 1918 – October 17, 2007), known professionally as Joey Bishop, was an American entertainer who appeared on television as early as 1948 and eventually starred in his own weekly comedy series playing a talk show host, then later hosted a late night talk show.
 He later became a member of the "Rat Pack" with Frank Sinatra, Peter Lawford, Sammy Davis, Jr., and Dean Martin.
Frank Sinatra Enterprises is a speciality record label founded in 2007 by Warner Music Group and the Sinatra family to manage the licence likeness rights to Frank Sinatra, as well as the singer's recordings at Reprise Records during the 1960s.
 In 2013, it was announced that a deal was struck with Universal Music Group to combine those recordings with his work at Capitol Records from the 1950s under UMG imprint called Signature Sinatra.
 A series of events to celebrate Sinatra's centenary in 2015 was organised and entitled "Sinatra 100".
The 7th Emmy Awards, later referred to as the 7th Primetime Emmy Awards, were held on March 7, 1955, to honor the best in television of the year.
 The ceremony was held at the "Moulin Rouge Nightclub" in Hollywood, California.
 The ceremony, hosted by Steve Allen and broadcast on NBC, was the first Emmy Awards ceremony to be televised nationally.
 All nominations are listed, with winners in bold and series' networks are in parentheses.
Sinatra is a 1992 CBS biographical drama miniseries about singer Frank Sinatra, developed and executive produced by Frank's youngest daughter Tina Sinatra and approved by Frank himself.
 Directed by James Steven Sadwith, produced by Richard M. Rosenbloom, and written by William Mastrosimone and Abby Mann.
 It stars Philip Casnoff, Olympia Dukakis, Joe Santos, Gina Gershon, Nina Siemaszko, and Marcia Gay Harden, with some of Sinatra's vocals recreated by Tom Burlinson.
 It won two and was nominated for seven Emmy Awards, along with a win and two nominations for a Golden Globe Award.
 Released on November 8, 1992, it was re-released on a two-disc DVD Warner Home Video on May 13, 2008.
The 19th Emmy Awards, later known as the 19th Primetime Emmy Awards, were handed out on June 4, 1967, at the Century Plaza Hotel in Los Angeles, California.
 The ceremony was hosted by Joey Bishop and Hugh Downs.
 Winners are listed in bold and series' networks are in parentheses.
The 5th Emmy Awards, retroactively known as the 5th Primetime Emmy Awards after the debut of the Daytime Emmy Awards, were presented at the Hotel Statler in Los Angeles, California on February 5, 1953.
 The ceremonies were hosted by Art Linkletter.

Question: What five member group was the co-host of the 19th Emmy Awards a member of along with Frank Sinatra?
Answer: Rat Pack