Watch as Elmo sits in an umpire's chair and debates the two letters found on Federer's On-branded sneakers: Is it 'Q' and 'C' or 'O' and 'N'?

Roger Federer and Elmo from Sesame Street seem to disagree on the letters of the alphabet in a Super Bowl ad for ON running shoes.

During each episode, Elmo takes viewers on thrilling explorations. Watch all your favourite ABC programs on ABC iview. More from ABC We acknowledge Aboriginal and Torres Strait Islander peoples as the ...

No one is more excited than Elmo himself. “There’s a lot to learn ... Songs double as life lessons on “Sesame Street,” from an alt-R&B-pop track about gratitude with SZA to an acoustic ...