What American variety show ran from 1951 to 1982, opened with bubbles and the sound of a champagne bottle opening?

The Lawrence Welk Show is an American televised musical variety show hosted by big band leader Lawrence Welk. The series aired locally in Los Angeles for four years, from 1951 to 1955, It then ran nationally for another 27½ years via the ABC network, from 1955 to 1971, and in first-run syndication from 1971 to 1982. In the years since first-run syndication ended, The Lawrence Welk Show has continued to reach new audiences through repeat episodes, broadcast in the United States by Public Broadcasting Service (PBS) stations. These airings incorporate an original program—usually, a color broadcast from 1965 through 1982—in its entirety. In place of the commercials, newer performance and interview clips from the original stars and/or a family member of the performers (in the latter instance, speaking for a well-known Lawrence Welk performer who has since died) are included; these clips are occasionally updated.

The show would often open by showing bubbles floating around and was accompanied by a sound effect of a bottle of champagne opening. He was most known for delivering these monologues in a distinctive German accent (this despite being born and raised in North Dakota). His speech pattern was parodied in popular culture (even by Welk himself: the two books he authored, Wunnerful, Wunnerful! and Ah-One, Ah-Two! were so titled because they were his catchphrases).