'I want to thank the public for attending the concert. Normally the concerts related to films have a different ambience and music. I didn't know that they like such music too. It was a little classical, Bachchan said after the concert. Talking about performing live, Bachchan said that it was tough. 'Performing live is always tough. It involves a lot of hard work. Here there is live music and audience which makes it tough,' he added.