The singer-and-actress admits she became very emotional after the NFL football player popped the question earlier this month and forgot to put on The Ring because she was so overwhelmed with emotion.
During an appearance on 'The Early Show', she revealed: "I had to sit on his knee to really get what was happening. I was shocked.
"I first said, 'Yes!' But I didn't even try the ring on until 5 minutes in. I just sat there and cried with him."
The 30-year-old star couldn't be happier with her ruby, diamond and gold Neil Lane band, which contains her birthstone, because it is different from a conventional engagement ring.
Before Eric proposed and made his new fiancee cry, he first "had a sit-down" with Jessica's father Joe and mother Tina to ask for their permission.
And his good manners are just one of the many things that the blonde beauty loves about the 31-year-old sportsman.
She added: "He is the best man in my life ... He is just really thoughtful. He keeps me very centred. He always makes me feel like my feet are on the ground.
"He's the most special part of my life and my day."