Canto-pop singer Leo Ku Kui-kei, who plays the last of this month's sold-out concerts at the Hong Kong Coliseum tonight and tomorrow, admitted he's had sleepless nights about passing up the chance to play the venue in the past. Playing the Coliseum is every Canto-pop star's dream, but back in 1997, when Ku became a household name with his hit single Enjoy Yourself Tonight, he was offered a concert deal - and turned it down. 'Sometimes, in the middle of the night, I feel regret about that decision,' said Ku (right). 'At that time, I wondered if one hit song was enough to make a good concert. 'I thought about it a lot. I thought I should accumulate more stuff first. But I've had to wait for eight years for another opportunity.' But Ku, 32, who will be back at the Coliseum for a four-night stint in three weeks' time, said the experiences he's gone through during the past eight years had made him not only a more mature artist, but a more mature person. 'I've had more hit songs now,' he said. 'I can also put all the strange ideas generated over these eight years into this series of concerts.' The concerts, the first for which fans have had to pay to see Ku perform, feature elaborate science fiction settings inspired by the popular Japanese animation figure, Gundam. 'I'm really into video games and comics. And it was my childhood dream to design my own robots. What I can do now is to project this dream on stage,' he said. Ku's concert series was originally scheduled for a three-night run, but the response from fans prompted organisers to add extra dates. 'I'm surprised and feel really grateful,' Ku said backstage at the Coliseum after his first show played to 12,500 fans. 'I'd never thought the demand would be so overwhelming. I don't want to disappoint those people who've waited for me for so long. 'So, we tried hard to see if the venue had any available time slots left to add extra shows. 'I really hope people who come to my show can believe that if you keep going for your dream, it will come true one day.'