"I think [the wedding] will be small," the singer, whose new single "California Gurls" just hit the Web, told PEOPLE at Friday's 7th Annual Bag Lunch, benefiting PS Arts at the Buckingham Estate in Brentwood, Calif. "I always have a ton of people around me and I think the people that are going to share this moment with us are the people we want to integrate into each other's lives."
But friends of the couple shouldn't worry about being left out of the festivities. The couple are also planning "a big, fat reception for the people who can't make it," Perry says.
As for the other important details – the location, the dress – Perry has some ideas for the big day. For example, the singer wants her dress designer to have special meaning.
"We have been kind of talking to [John] Galliano because that was the first [fashion] show in Paris that we kind of came out as a couple," she says. "So if we did Galliano, it would make it full circle."
For the location, the Santa Barbara, Calif., native always thought she would be "married and buried" in her hometown, but now she says she doesn't want loved ones in attendance to be in familiar surroundings when she ties the knot.
"We don't necessarily want it to be a drunk fest of people just, you know, one night and then forgetting about it," she says. "We want it to be about the love. So sometimes to be about the love, we have to take them out of their comfort zone."