Los Angeles, January 6 : Actor Olivia Rodrigo is ecstatic after being nominated for six Grammy Awards. At the premiere of 'The Hunger Games: The Ballad of Songbirds and Snakes' in Los Angeles, the 20-year-old singer-songwriter said it was "such an honour," according to People. "Noah Kahan got nominated for best new artist, and we were so excited," Rodrigo tells …