Andy Samberg was living the dream of many young comedy writers when he nabbed an audition for "Saturday Night Live," but the work doesn't stop once you get in front of series creator Lorne Michaels. Samberg was already nervous to try out for SNL, but his anxiety mounted when producers threw a last-minute twist at the comedian just days before his callback.

Samberg's first audition was thoroughly prepared, although some bits were better than others. "It was more for me the audition was less about concrete bits that I was just nailing and more about sort of the vibe," he confessed on The Howard Stern Show. One piece of the audition that scared him was impressions. Everyone who auditions for "Saturday Night Live" is required to do some impressions, regardless of whether it's one of their strengths as a comedian.

"I had to come up with some," Samberg explained. "I...