Adele and Justin Bieber make Forbes' bright young things list

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.

25-year old rapper Wiz Khalifa makes the list as does 27-year old singer Bruno Mars.

Also getting a place are actresses and fashion designers Ashley and Mary-Kate Olsen - no strangers to the limelight, despite their tender age of 26.

Olympic gold medalist Gabby Douglas is on there too, and the future also looks bright for this 16-year-old American gymnast.

SOUNDBITE: Olympic gold medalist Gabby Douglas, saying (English):

"I haven't considered retiring because I would be too young."

The full list will be published in the January 21 issue of Forbes.