American Idol (season 8) Guest performances Guest performances

| Week | Performers | Hot_100_Reaction | Hot_Digital_Songs_Reaction | Notes |
|---|---|---|---|---|
| Top 36/ Group 1 | Carly Smithson Michael Johns | Ineligible to chart (No legal digital release) | Ineligible to chart (No legal digital release) | live performance |
| Top 36/ Group 2 | Brooke White | 47 (debut) | 27 (51,171 +999%) | live performance |
| Top 36/ Group 3 | No performer | No performer | No performer | No performer |
| Top 13 | Kanye West | 7 (+1) | 13 (95,223 +18%) | pre-recorded |
| Top 13 | Kelly Clarkson | 5 (+4) | 6 (141,167 +38%) | live performance |
| Top 11 | Brad Paisley | 35 (debut) | 18 (64,127 +999%) | live performance |
| Top 11 | Carrie Underwood Randy Travis | 9 (+48) | 4 (125,806 +701%) | pre-recorded |