As if baffling generations of kids with brightly-coloured letters and monsters wasn’t enough, Sesame Street has also featured an impressive array of guest-starring musicians.
Many of these guests have sung alternate versions of their own songs, including Feist, Paul Simon and, unforgettably, James Blunt. And then there's this.
The Muppets themselves also get in on the covers-ish act: this rendition of, erm, Born to Add will have The Boss spinning in his leather jacket.
For a few other puppety musical highlights, check out MusicRadar’s 11 greatest Sesame Street guest songs.
S is also for... Sampling: Sampling is often used a means of transferring a hook from one track to another. Jason Derulo may have drawn criticism from some quarters for his use of Imogen Heap’s Hide and Seek, but it certainly slots seamlessly into Whatcha Say.