The United States has unseated Germany to top the global nation brand ranking of Anholt-GfK, while the UK, France and Canada maintained their top 5 positions.

Simon Anholt, the former ad exec who created the index, said Germany's slip from the top slot was because of its image as the European leader. It lost ground on its perceived governance due to immigration issues and struggling economies across Europe.

The study, based on the perceptions of 50 countries, is based on six dimensions: exports, governance, culture, people, tourism and immigration/investment.

Falling in the ranking was Greece, which slipped to 21st amid its economic woes, while Brazil climbed into its slot at No. 20. Notably, Russia rose three slots to No. 22 overtaking China, Singapore and Argentina, while Ukraine jumped two spots to No. 46.

GfK maintains a country's global reputation affects business, trade and tourism.

Here are the top 10:

1. US (2 last year)
2. Germany (1 last year)
3. United Kingdom
4. France
5. Canada
6. Japan
7. Italy
8. Switzerland
9. Australia
10. Sweden.