"My only qualification to be a babysitter is that I used to be a baby," Hernandez said as the audience laughed.
"That's crazy. That's like saying, 'Hey, you're sick a lot. Do you want to be my doctor?' Or, 'Weren't you the host of a reality show? You want to be president of the United States?'"
Mandel let out a huge laugh and then stood up on his feet. Klum followed in his footsteps and also gave the young girl a standing ovation.
Hernandez quickly got a "yes" from all four judges and therefore advanced in the Season 11 competition.
Hernandez revealed she began doing stand-up comedy when she was 10-years-old as an effort to make her father smile after he got Bell's palsy, which is a form of facial paralysis.
Another standout audition from last night was Sal Valentinetti, a pizza delivery man who wowed the judges with his unexpected Frank Sinatra-like singing voice. Klum pressed the "Golden Buzzer" for him, sending the man straight through to AGT's live shows.