Nikki Glaser and Howie Mandel exclusively sit down with ET's Denny Directo at the iconic Laugh Factory in Los Angeles to discuss Nikki's guest judge debut on 'America's Got Talent.' Nikki joined the judge's table after Howie texted her directly with the request. Nikki explains, she knows firsthand what it's like to be critiqued, especially after getting her start on 'Last Comic Standing' at 18 years old. The two also discuss what they credit their big breaks to (including Howie shouting out his first ET interview!). Nikki's 'AGT' guest judge stint airs Tuesday at 8 p.m. ET/PT on NBC.
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