Sesame Street is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV ...

Katy Perry was happy to perform one of her early songs with Elmo from 'Sesame Street,' but some parents weren't enthused.

Turns out, that song is “Elmo’s Song,” and the two dueted on a pop rendition that featured the Not-Too-Late Show ‘s house band and a healthy dose of Auto-Tune on Nas’ vocals.

SZA, music star (and now successful actor thanks to "One of Them Days"), chats with, and then sings to, Elmo. Also, somebody named Abby Cadabby and somebody named Gabrielle? The name Abby rings a ...

Elmo came in hot with the hard-hitting questions, beginning the interview by asking the brothers to make goofy faces. Nick, Joe, and Kevin also stuck around to sing a song about brushing your teeth.

Watch a duet between Elmo and Hoots the Owl on stage with the Jazz at Lincoln Center Orchestra with Wynton Marsalis. Be careful not to sprain yourself smiling.