Amitabh & Abhishek Bachchan have postponed the concert from August-September 2007 to the middle of 2008.Confirming this rather surprising development, the Big B, now shooting in Kolkata for Rituparno Ghosh's The Last Lear, explains, "Yes, we've to shift the proposed concert to next year because of Abhishek and Aishwarya's wedding.With the wedding also happening it would be impossible for them to leave for two months. We've to give them time to finish their other commitments. This year they don't even have time for any rehearsals. That apart, the concert-tour plans remains unchanged. It's still the three of us, plus a lot of our colleagues." Hrithik Roshan and Priyanka Chopra are some of the other stars who would be accompanying the Bachchans for the world tour which is being designed as the most spectacular staged event from the Mumbai film industry of all times.Laughs the Big B, "I don't know about that. But we'll certainly work towards making it a memorable experience. Right now we all have other things to worry about, including the wedding."Fresh dates for the Ash-Abhishek continue to be announced every week. Says the Big B, "We don't know where these dates come from. Media-persons, astrologers and numerologists seem to know more about our plans than we do.

As far as we are concerned we still haven't zeroed -in on a date for the wedding. After I get back to Mumbai from Kolkata we'll work it out."