Who wouldn't want to hold court with Queen B?

Beyoncé and her mom, Tina Knowles, have launched an auction that will let the winning bidder and a guest spend a day backstage on the Mrs. Carter Show World Tour -- in Los Angeles, New York or a yet-to-be-named city.

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"The Backstage With Beyoncé Online Auction will give fans the once-in-a-lifetime opportunity to live their wildest dream for a fantastic cause," said Coppy Holzman, chief executive and founder of Charitybuzz, which will host the auction at charity buzz.com/missameal.

The charity, the Miss a Meal campaign of Bread of Life Inc., encourages folks to donate the money they would have spent on a meal to feed the hungry.

Bidding on the L.A. backstage experience ends June 11; the New York experience begins accepting bids June 27 and runs through July 17. The surprise city will be announced this summer. Each auction package is valued at $25,000, according to Charitybuzz.

"We look forward to seeing the winners of the auction and showing them tour life, which is a lot of fun," Tina Knowles said in a statement. "They get to have a great time while making a donation and a difference in people's lives."