US Singer-songwriter Bruno Mars' mother, Bernadette Hernandez, died of a brain aneurysm at the age of 55 in Honolulu, Hawaii, TMZ reported Sunday. Hernandez died at the Queens Medical Centre, the celebrity gossip website said. She was a hula dancer and had immigrated to the United States from the Philippines. Mars is set to begin a US tour later this month, TMZ said. There was no word on whether the death would affect the concert schedule