Ella Fitzgerald on top form:
Ella herself recorded a live version of the song for her 1960 album Ella in Berlin, when she famously forgot the words and improvised her way through. The performance here, as far as I can tell from the YouTube comments, seems to be in Stockholm, some time later in the Sixties. She's still improvising though - she breaks into a Louis Armstrong impression around 2:30, then she's off:
Bobby Darin....and Louis Armstrong....both made records....of this song...and now Ella...Ella the fella.....(indecipherable)....the same old song....
Whatever. A classic performance.