Gary Barlow organised the music event in front of Buckingham Palace to celebrate the Queen's 60 years on the throne, but allegedly did not want Duran Duran to perform.
''Well, Julian Lloyd-Weber and Gary Barlow, I have to say, I am in the least - underwhelmed (sic)," Le Bon tweeted during the show on Monday evening (June 4).
''Well, at least we have Sir Paul McCartney's 'willy dance' to look forward to. He is on it, right?''
Le Bon later claimed: "I absolutely wish that DD'd (Duran Duran had) been part of the Jubilee concert. But it was a Gary B booking, and he didn't want us.''
The following day Le Bon added: "Really enjoyed Stevie Wonder & Sir P.McC. way too w**kered to tweet. Apparently I was shouting at the telly until late."
Sir Paul McCartney, Sir Elton John, Stevie Wonder, Robbie Williams, Kylie Minogue, Cheryl Cole, Ed Sheeran, Jessie J, Dame Shirely Bassey and will.i.am were among the artists who performed.
Photo gallery - the Diamond Jubilee Concert:
Watch Sir Paul McCartney's closing set at the Diamond Jubilee concert below: