Actually, The Petronas Towers in Malasyia are number 1, sears tower at number 2..
Canada aint even on the list buddy....
1. Petronas Towers (Kuala Lumpur, Malaysia) - 1,483 ft (452 m)
2. Sears Tower (Chicago, USA) - 1,454 ft (443 m)
3. Jin Mao Building (Shanghai, China) - 1,379 ft (420 m)
4. Empire State Building (New York City, USA) - 1,250 ft (381 m)
5. Central Plaza (Hong Kong, China) - 1,227 ft (374 m)
6. Bank of China (Hong Kong, China) - 1,209 ft (369 m)
7. Emirates Towers (Dubai, UAE) - 1,149 ft (350 m)
8. The Centre (Hong Kong, China) - 1,149 ft (350 m)
9. T&C Tower (Kaohsiung, Taiwan) - 1,140 ft (347 m)
10. Amoco Building (Chicago, USA) - 1,136 ft (344 m)