Le Bon also took to Facebook to respond to the allegations.
In a statement to Duran Duran's official page, Le Bon said: 'I have read the statement which Ms Hariri posted yesterday on Facebook about a record signing 23 years ago at Wherehouse in LA.
'The behaviour that Ms Hariri has accused me of, would have been just as inappropriate and unacceptable to me then as it is today. But the allegation is simply untrue.
'When Ms Hariri first contacted me about her claim months ago, I proposed meeting with her in person so I could set the record straight. Instead, she has decided to pursue this publicly. I have always been one who can admit to my mistakes and apologise for my failings.
'But I cannot apologise for something I did not do.'
In a comment on the post, the band's longtime publicist Katy Krassner wrote, 'I was also at the in-store event in 1995, and I can tell you that what he is being accused of DID NOT happen.
'Simon was never out of my sight that entire day, as each of the people on the Duran Duran team were 'assigned' to a band member to help with the record signing.
'Apart from anything else, as any fan knows, these kinds of events are a whirlwind of quick handshakes and photo calls which literally last a matter of seconds. The idea that he sat there, right next to his band mates, in front of a bunch of cameras, reaching behind him to sexually assault someone that day is simply ludicrous.'
Hariri has not responded to Le Bon's most recent comments.