The biggest music markets in the world according to IFPI.
1.
US
1. Katy Perry - Roar 1.0000
2. Lady Gaga - Applause 0.4628
2.
Japan
5. Lady Gaga - Applause 0.1790
16. Katy Perry - Roar 0.0763
3.
UK
4. Lady Gaga - Applause 0.5835
38. Katy Perry - Roar 0.0594
4.
Germany
2. Katy Perry - Roar 0.6796
4. Lady Gaga - Applause 0.5455
5.
France
3. Lady Gaga - Applause 0.7880
4. Katy Perry - Roar 0.5088
6.
Australia
1. Katy Perry - Roar 1.0000
4. Lady Gaga - Applause 0.4220
7.
Canada
1. Katy Perry - Roar 1.0000
2. Lady Gaga - Applause 0.4386
8.
Brazil
1. Lady Gaga - Applause 1.0000
2. Katy Perry - Roar 0.9535
9.
Italy
2. Lady Gaga - Applause 0.9622
3. Katy Perry - Roar 0.6595
10.
Netherlands
3. Lady Gaga - Applause 0.6091
6. Katy Perry - Roar 0.5603
Lady Gaga: 6/10
Katy Perry: 4/10