Actress Samantha Ruth Prabhu has been selected as the first southern ambassador of mango drink Maaza. "Just shot for MAAZA. Their first South ambassador. Such an honour. Grew up on it. Elated. Love (sic)," Samantha tweeted Saturday. Samantha, who was recently seen in Tamil blockbuster "Kaththi", is currently shooting for road thriller "10 Enradhukulla".