What is the most famous U2 song?

Answer 1

U2 has had six Number One hit songs in the UK: Sometimes You Can't Make It on Your Own, Vertigo, Beautiful Day, Discoteque, The Fly, Desire.

In the US, they have had two Number One hit songs: With or Without You and I Still Haven't Found What I'm Looking For.

Answer 2

According to the Billboard Rating Charts, here are their Top Songs:

1. With or Without You (Hit Number 1)
   
2. I Still Haven't Found What I'm Looking For (Hit Number 1)
   
3. Desire (peaked at Number 3)
   
4. Mysterious Ways (peaked at Number 9)
   
5. One (peaked at Number 10)
   
6. Discoteque (peaked at Number 10)
   
7. Where The Streets Have No Name (peaked at Number 13)
   
8. Angel of Harlem (peaked at Number 14)
   
9. Beautiful Day (peaked at Number 21)
   
10. Staring at the Sun (peaked at Number 26)
    
11. Vertigo (peaked at Number 31)
    
12. Even Better Than the Real Thing (peaked at Number 32)
    
13. Pride (In the Name of Love) - peaked at Number 33
    
14. Who's Gonna Ride Your Wild Horses (peaked at Number 34)
    
15. Get On Your Boots (up to Number 37 so far in 2009)