Dave was chuffed to high heaven to appear alongside the Cookie Monster, Ernie and Big Bird and all the lovable Street beasts - not least because a stint on the popular show is a foolproof way of winning hearts and minds in the States. As James Blunt can attest to.
So did Becks sing a nice song, or show off some fancy footwork to Elmo? Not quite - he introduced kiddly wunks to the word 'persistence' and explained why for him, it's his favouritist persistentistly bestest word ever.
Well done Dave. Now have a singalong to some vintage Sesame Street.