The fourteenth episode of Season 3, and the forty-first episode of America's Got Talent overall, aired on September 9, 2008. It was the first of two Semifinals performance episodes and took place in Hollywood. 10 acts performed for 5 spots in the Finals. The ten acts from the previous episode learned whether they had advanced to the Top 20 Semifinals.
Performed
| Name | Image | Act | Judges' Buzzers |
|---|---|---|---|
| 1. The Cadence | 
|
Percussion Group | Piers: |
| 2. Queen Emily | 
|
Singer | Piers:
Sharon: David: |
| 3. The Wright Kids | 
|
Bluegrass Band | Piers:
Sharon: David: |
| 4. The James Gang | 
|
Dancing Vocal Group | Piers:
Sharon: David: |
| 5. Daniel Jens | 
|
Singer | Piers: 
Sharon: David: |
| 6. ZOOperstars! | 
|
Mascot Dance Group | Piers:
Sharon: David: |
| 7. Neal E. Boyd | 
|
Opera Singer | Piers:
Sharon: David: |
| 8. Jessica Price | 
|
Singer and Guitarist | Piers:
Sharon: David: |
| 9. Extreme Dance FX | 
|
Clogging Group | Piers:
Sharon: David: |
| 10. Paul Salos | 
|
Frank Sinatra Impersonator | Piers:
Sharon: David: |
Moved On
 Nuttin' But Stringz
Hip-Hop Violin Duo |
 Kaitlyn Maher
Singer |
 Eli Mattson
Singer and Pianist |
 Donald Braswell
Opera Singer |
 The Tapping Dads
Tap Dance Group (JC) |
Eliminated
 Indiggo
Vocal Duo |
 Flambeaux
Fire Breather |
 Dorae Saunders
Tina Turner Impersonator |
 Dallas Desperados Dancers
Dance Group |
 Bryan Cheatham
Singer (JC) |
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