As Bol Bachchan is inching towards the `100-cr club, Ajay Devgn and Abhishek Bachchan want to throw a bash for its success. So what is stopping them you ask? Well, we have learnt that Amitabh Bachchan, who is in London for the Olympics is expected back in India only on August 5, has sent his son a message saying that he wants to be a part of the BB celebrations and that Ajay and Abhi should wait for him to return before getting into party mode. One also hears that since Amitabh is the one who carried the Olympic Torch in London a day before the opening ceremony, Ajay and Abhishek want to throw a party in Big B’s honour. So it’s a twin celebration for the Bachchans.