The TV host - who married the former 98 Degrees singer on Necker Island in the Caribbean last Friday (15.07.11) - chose a "traditional" two-piece Monique Lhuillier gown and wore her hair flowing down her back because Nick told her it was his favourite look.
She explained: "I probably had half a dozen fittings and I was just so lost. I finally decided to ask Nick and said, 'What do you want to see me in when you marry me and I become Mrs. Lachey?' .
"I thought I would get some generic guys' answer but he sat up in bed and told me he loved me with my hair down . and wanted me in something traditional but with a modern flair."
After taking Nick's advice, the brunette beauty instantly knew which dress was right for her because she felt "so beautiful" in it.
She added to People.com: "I knew it was the dress because of the conversation I had with Nick. It just felt so right and I felt so beautiful in it."
Meanwhile, Vanessa - who accessorised the gown with Swarovski-encrusted Christian Louboutin slingbacks, a Judith Leiber Clutch and diamond stud earrings, which were a gift from Nick - decided to go for the "natural" look when it came to her make-up.
She said: "Two dear friends of mine that I met while working at MTV did my hair and make-up. We went very natural because I wanted Nick to see me, not a bunch of makeup and Big Hair. It was such a tropical location but we wanted our wedding to have a timeless feel."