London Calling

"London Calling" is a song by the Clash's from their 1979 album of the same name.

Robin and three other frogs, forming an acapella group called "Croak-A-Pella," attempted to sing the song at The Muppets Take the O2 in 2018. Their nervousness instead causes them to repeat "ribbit" over and over again, barely getting beyond the first line of the song.