India, July 15 -- Rihanna, 37, who is expecting her third child with rapper A$AP Rocky, attended the blue carpet premiere of her upcoming film Smurfs with her children Riot Rose Mayers and RZA Athelston. The singer and actor was all smiles as she posed for pictures with her little ones. She showed off her baby bump on the blue carpet in a ball gown and an edgy jacket. Riot, who will turn two next month, and the three-year-old RZA Athelston held their mama Rihanna's hands, dressed to the nines in matching outfits on the blue carpet. They even interacted with the Smurfs with wide smiles, happy to see life-size versions of the characters. HTC...