Our Stan Freberg Day celebration continues! I mentioned how Soupy Sales on his legendary kids' show would have puppets mime to Freberg records. He wasn't the only one who did this. Jim Henson started his Muppet Magic on a local TV show in Washington D.C. called Sam and Friends between '55 and '61. Here, Mr. Henson and one other puppeteer perform to Stan's record of "I've Got You Under My Skin." (The other puppeteer is probably Jane Henson, Jim's wife.) That's Freberg's voice you hear coming out of the mouth of the Kermit prototype…