1: Jennifer Lawrence is the most valuable star of 2015, according to a new ranking by editors at culture and entertainment website Vulture.com. The ranking was based on a formula of numerous metrics, including box-office earnings, likability ratings and social-media chatter. REUTERS/Luke MacGregor
2: Robert Downey Jr. is second. REUTERS/Stefan Wermuth
3: Leonardo DiCaprio is third. REUTERS/Carlo Allegri
4: Bradley Cooper is fourth. REUTERS/Carlo Allegri