It will be wedding number two, but Jessica Simpson is going all out, regardless!

When the 33-year-old says her "I do" to fiancée Eric Johnson it will be "the grandest event of the year," her pal told InTouch Magazine.

"Jessica wants it to be the hugest, grandest event of the year," her friend told the magazine.

"She’s calling it a ‘supersize wedding!'"

As Breaking Celebrity News previously reported, Johnson and Simpson will tie the knot in Santa Barbara, Calif., and according to InTouch it will be at the posh San Ysidro Ranch.

The ceremony will be complete with a large barbecue spread and fancy fireworks display.

Simpson — who has lost a reported 55 pounds since having her last child — will walk down the aisle in a custom pink Marchesa gown.

"It took her over a year to decide on it!" the pal said.