"I was busy doing some side work and ended up going back to my table thinking I should grab the guest book off the table. It was still a few minutes before I actually opened it and when I did eventually open it and I saw it, I was in disbelief. I couldn't even believe (it). I was trying to figure out if they made some type of error," she told WITN.

The North Carolina waitress was waiting on a family of five.

The bill itself was $75.70, according to WTHR.

"I felt extremely blessed and immediately humbled; I was so shocked I wanted to cry," Irwin said. "I'm just amazed. You hear about generous tips around the holiday; I've never personally had it happen to me, so I just want to make sure I do the right thing and again I just want them to know how thankful I am."

She plans on using some of the money for Christmas shopping, and wants to pay if forward by helping out someone else.