"The Muppet Show" premieres 1977

Jim Henson's multi-award winning variety show The Muppet Show premiered April 23, 1977.  It gained in popularity, but Jim Henson wanted to end the show on a high note.  The last season had the highest Nielsen ratings ever.  

It won four Primetime Emmy awards including one for Rita Moreno for her guest appearance.  

Kermit the Frog and Waldorf appeared in all 120 episodes.

Janet Jackson, Patti LaBelle and Kermit the Frog selected for National Recording Registry

The National Recording Registry announced its selections for “audio treasures worthy of preservation for all time based on their cultural, historical or aesthetic importance in the nation’s recorded sound heritage” for 2020 yesterday, March 24, 2021.

Among the 25 selections are Janet Jackson's Rhythm Nation 1814 album, LaBelle's single Lady Marmalade, Kermit the Frog's performance of Rainbow Connection, and Kool & the Gang's Celebration.

See all the selections here:

https://variety.com/2021/music/news/library-of-congress-national-recording-registry-nas-janet-jackson-1234936992/