India, May 22 -- In his four-and-a-half decade-long career as a musician, Sonu Nigam has won several awards, including the coveted Padma Shri. Now, the singer is set to add another feather to his cap. On June 10, Nigam will perform two back-to-back shows at the prestigious Sydney Opera House in Australia, a first by any solo musician. This also marks his debut at the venue....