Who was the runner up of American idol season 1-2-3-4-5-6-7-8?

Here are the runners-up of American Idol from seasons 1 to 8:

1. Season 1: Justin Guarini

2. Season 2: Clay Aiken

3. Season 3: Diana DeGarmo

4. Season 4: Bo Bice

5. Season 5: Katharine McPhee

6. Season 6: Blake Lewis

7. Season 7: David Cook

8. Season 8: Adam Lambert