Though she's been engaged since November, Vanessa Minnillo hasn't done much wedding planning yet, according to

"I always feel irresponsible, like I'm unprepared for my test at school," she said, while chatting with Rachel Ray on her talk show, which airs next Monday. "We have nothing yet, except for the wedding planner."

If fiance Nick Lachey had any say in the matter, however, it would be a very non-traditional wedding -- as in plastic cups and foam fingers.

"If I let Nick plan the wedding it'll be around some sporting event," she said. "We'll have a big old tailgate party with Miller Light! We'll have University of Cincinnati Bearcats running around!"