British singer Adele has made Forbes magazine's annual '30 under 30' list for a second year running. The 24-year old had a whirlwind year in 2012 - taking home six Grammy awards for her album '21', as well as giving birth to a baby boy. Justin Bieber is also listed as one of the world's top achievers under 30 years of age. The 18 year old Canadian pop star had the 20th highest grossing tour this year, making 30 million dollars from 29 shows as part of his ongoing 'Believe' show.
Download the TV Guide app for iPhone, iPad and Android!