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| •Jerry Springer | played | Himself (Host S02 - present) |
| •David Hasselhoff | played | Himself (Judge S01 - present) |
| •Piers Morgan | played | Himself (Judge S01 - present) |
| •Sharon Osbourne | played | Herself (Judge S02 - present) |
| •Regis Philbin | played | Himself (Host S01) |
| •Brandy | played | Herself (Judge S01) |
| •Neal E. Boyd | played | Himself - Opera singer (Winner S03) |
| •Eli Mattson | played | Himself - Singer & Piano player (2nd place S03) |
| •Nuttin' But Stringz | played | Themselves - Sibling violinists of classical and hip-hop, Tourie and Damien (3rd place S03) |
| •Donald Braswell Ii | played | Himself - Opera singer (4th place S03) |
| •Queen Emily | played | Herself - Singer (5th place S03) |
| •Jessica Price | played | Herself - Singer (Top 10 S03) |
| •Joseph Hall | played | Himself - Young "Elvis" impersonator (Top 10 S03) |
| •Kaitlyn Maher | played | Helself - A 4-year old singer (Top 10 S03) |
| •Paul Salos | played | Himself - Frank Sinatra style singer (Top 10 S03) |
| •The Wright Kids | played | Themselves - 3 kids who play the guitar, mandolin & upright bass, Bluegrass (Top 10 S03) |
| •The Cadence | played | Themselves - Stomp-style percussion group (Top 20 S03) |
| •Daniel Jens | played | Himself - Singer/guitarist soldier returned from Iraq (Top 20 S03) |
| •Extreme Dance Fx | played | Themselves - Contemporary young clog team (Top 20 S03) |
| •The James Gang | played | Themselves - A hip-hop rap quartet dressed like the 1920's (Top 20 S03) |
| •Jonathan Burkin | played | Himself - Baton twirler (Top 20 S03) |
| •Sarah Lenore | played | Herself - Singer (Top 20 S03) |
| •Sick Step | played | Themselves - Hip Hop dance troop (Top 20 S03) |
| •The Tapping Dads | played | Themselves - A large group of tap dancing dads (Top 20 S03) |
| •The Taubl Family | played | Themselves - Family of singers that play a large variety of instruments (Top 20 S03) |
| •Zooperstars | played | Themselves - Oversized animal mascot/Costume characters (Top 20 S03) |
| •Beyond Belief Dance Company | played | Themselves - A 22 member dance troupe (Top 40 S03) |
| •Bruce Block | played | Himself - Magician (Top 40 S03) |
| •Bryan Cheatham | played | Himself - Singer and former male stripper (Top 40 S03) |
| •Dallas Desperados Dancers | played | Themselves - The dance team of the Dallas Desperados Arena Football team (Top 40 S03) |
| •Dc Cowboys | played | Themselves - All-male dance troupe (Top 40 S03) |
| •Derrick Barry | played | Himself - Britney Spears impersonator (Top 40 S03) |
| •Dorae Saunders | played | Himself - A male Tina Turner impersonator (Top 40 S03) |
| •Elite | played | Herself - A 11-year old martial artist (Top 40 S03) |
| •Flambeaux | played | Himself - A Fire breather (Top 40 S03) |
| •George The Giant | played | Himself - A carnival sideshow style performer (Top 40 S03) |
| •Indiggo | played | Themselves - Singers who are identical twin sisters Mikaela and Gabriela (Top 40 S03) |
| •Jonathan Arons | played | Himself - Trombonist and dancer (Top 40 S03) |
| •Kazual | played | Themselves - A cappella barbershop quartet style group (Top 40 S03) |
| •Matthew Piazzi | played | Himself - Celebrity impersonator (Top 40 S03) |
| •Michael Strelo-smith | played | Himself - Opera singer (Top 40 S03) |
| •Ronny B. | played | Himself - Singer and dancer (Top 40 S03) |
| •Shequida Hall | played | Himself - Female impersonator and operatic singer (Top 40 S03) |
| •Shimshi | played | Himself - Magician (Top 40 S03) |
| •Slippery Kitten's Burlesque | played | Themselves - A group of high-energy burlesque strippers (Top 40 S03) |
| •Texas State Strutters | played | Themselves - A precision dance team from Texas State University (Top 40 S03) |
| •Terry Fator | played | Himself - A ventriloquist / impressionist (Winner S02) |
| •Cas Haley | played | Himself - Singer & guitar player (2nd place S02) |
| •Butterscotch | played | Herself - A Beatbox singer (3rd place S02) |
| •Julienne Irwin | played | Herself - A 14-year old country singer (4th place S02) |
| •Jason Pritchett | played | Himself - Singer & guitar player (Top 10 S02) |
| •The Glamazons | played | Themselves - Four plus-sized ladies who sing & burlesque dance (Top 10 S02) |
| •Robert Hatcher | played | Himself - Singer (Top 10 S02) |
| •Sideswipe | played | Themselves - Martial Arts dance group (Top 10 S02) |
| •The Duttons | played | Themselves - A family country band of 9 adults & 5 children (Top 10 S02) |
| •The Calypso Tumblers | played | Themselves - A Reggae-inspired dance group (Top 10 S02) |
| •Boy Shakira | played | Himself - Female impersonator / dancer of Britney & Shakira (Top 20 S02) |
| •The Fault Line | played | Themselves - Progressive vocal rock band (Top 20 S02) |
| •Gregory Popovich's Comedy Pet Theater | played | Themselves - Trained animal act with cats and dogs (Top 20 S02) |
| •Johnny Lonestar | played | Himself - Trick rope western act (Top 20 S02) |
| •Jonny Come Lately | played | Themselves - A rockabilly band consisting of 3 guys and 1 girl all 15-year-old (Top 20 S02) |
| •Kevin James (2) | played | Himself - Magician and performer (Top 20 S02) |
| •Manuel Romero | played | Himself - Singer (Top 20 S02) |
| •Mohammad Kashif | played | Himself - A "Bollywood-inspired" dancer (Top 20 S02) |
| •Second Story Guys | played | Themselves - Dance group on stilts (Top 20 S02) |
| •Southern Girl | played | Themselves - All-female singing trio (Top 20 S02) |
| •Bianca Ryan | played | Herself (Winner S01) |
| •Taylor Ware | played | Herself - An 11 year old yodelist (2nd place S01) |
| •Celtic Spring | played | Themselves - A family Irish step dancing / fiddling act (3rd place S01) |
| •The Millers | played | Themselves - A musical group consisting of two brothers, Cole age 20 & L.D. age 12 (4th place S01) |
| •All That | played | Themselves - A clogging ensemble (5th place S01) |
| •At Last | played | Themselves - An a cappella act, performing R&B songs with a hip hop beat (Top 10 S01) |
| •The Passing Zone | played | Themselves - A comedy / juggling act (Top 10 S01) |
| •Rappin' Granny | played | Herself - A 73 year old Grandmother who Raps (Top 10 S01) |
| •Dania Maas | played | Herself - Quick Change a Clothes-changing magic act (Top 10 S01) |
| •David Maas | played | Himself - Quick Change a Clothes-changing magic act (Top 10 S01) |
| •Realis | played | Themselves - An acrobatics mixed pair performing hand-to-hand balancing (Top 10 S01) |
| •Alexis Jordan | played | Herself - A 14 year old Singer (Top 20 S01) |
| •Bobby Badfingers | played | Himself - A professional finger snapper (Top 20 S01) |
| •Caitlyn Taylor Love | played | Herself - Singer (Top 20 S01) |
| •Corina Brouder | played | Herself - Singer who plays the Harp (Top 20 S01) |
| •Jessica Sanchez | played | Herself - Singer (Top 20 S01) |
| •Leonid The Magnificent | played | Himself - Exotic circus performer (Top 20 S01) |
| •Michelle L'amour | played | Herself - American neo-burlesque performer (Top 20 S01) |
| •Natasha Le | played | Herself - An 8 year old pianist (Top 20 S01) |
| •Nathan Burton | played | Himself - A magician (Top 20 S01) |
| •N'versity | played | Themselves - An all-girl singing group (Top 20 S01) |