By Chelsea Karnash

PHILADELPHIA (CBS) – Another flash mob is set to take place in Philadelphia, but it’s not the kind you might think.

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This flash mob is all about love.

On Saturday, Sept. 8th, Flash Mob America will surprise an unsuspecting bride-to-be at a top secret location in Philadelphia, where participants will burst into choreographed dance. It’s all part of a special marriage proposal slated to happen at 4:30 p.m.

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The organization is currently looking for volunteers to participate in the dancing mob. There will be rehearsals the evening before and on the day of the event, and once you register to take part, you’ll receive the confidential location information.

If you’d like to be a part of the lucky mystery couple’s engagement, visit: www.flashmobamerica.com/event-registration/philadelphia-marriage-proposal-sept-8th-registration

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