South Africa, Dec. 23 -- Kim Kardashian's Skims brings in $1.7bn per year, more than any other celebrity fashion business in the world.

Rihanna's Savage X Fenty saw one of the biggest revenue jumps, growing over 500% in one year from $53 million to $324 million.

Kanye West's Yeezy is the most popular celebrity brand, with 6.4 million people checking it online each month.

The research examined more than 20 celebrity fashion brands to find which ones are doing best financially. The research looked at how much money each brand makes per year, what the brand is worth overall, and how many people check it online each month.

1. Kim Kardashian - Skims

Revenue: $1.7bn per year

Brand value: $5bn

People checking it online: 4.43 million

Kim ...