During The Muppet Show's first season; voice of Jim Henson.
Frank Sinatra [idem and on lp Sinatra & Company]
Van Morrison [as Bein' Green on Hard Nose The Highway; his Ireland's green too]
Ray Charles [also in The Muppet Show in duet with Kermit]
Don Henley [also with Kermit]
Ubie Green [as Bein' Green]