Well, that's not quite true.
There are a few songs in Radio Clash 89: DJNoNo is a Muppet that are a bit less than work-safe. Well, actually quite a few of the songs are less than work-safe.
Scroll ahead about 1/3 of the way through, there's a long bit of talk discussing hardware to produce the show, and then the Muppet-themed segment kicks in.
With numbers like "Kanye Mahna" and "Thugged Out Fraggle Rock Bitch" it's fucking hysterical.
ETA: and then there's "Macamuppet," a mash-up of "The Macarena," "Break on Through" by the Doors and (of course) "Mahna Mahna"