Jessica Simpson may not have a date set for her wedding to former NFL player Eric Johnson, but that hasn't stopped her from thinking about what kind of dress she'll wear.

"It's definitely going to be beautiful," the 30-year-old singer, told PEOPLE. "I want it to be different from what I've had before. I have a lot of tear sheets!"

The fashion mogul revealed that she usually leans towards v-necks and scoop necks because those looks help her avoid appearing "top heavy."

"I like my collar bone," Simpson added. "I have a long neck, so I like to show off my décolletage."

But that's as far as she's gotten. When asked about the color, Simpson reveals she doesn't know: "I haven't really thought about it. I do like the romantic feel of a lighter color."