World's Most Tallest buildings

1: Burj Khalifa, Dubai

2: Taipei, Taiwan

3; Shanghai World Financial Center, china

4: Petronas Towers, Malaysia

5: Willis Tower, United States

6: Trump International Hotel & Tower, United States

7: Jin Mao Tower, China

8: CITIC Plaza, China

Reference:
http://skyscraperpage.com/diagrams/?buildingID=7787