Flash Mob Proposal: Joey Lancianese Shuts Down Street With 300 Dancers For Flash Mob Proposal (VIDEO)

WATCH: Why This Man Closed Down A Street With 300 Dancers

Over the weekend, one Pennsylvania man proved that no act of love is too extravagant for his beloved when he orchestrated an elaborate flash mob proposal that involved 300 dancers.

In a heartwarming YouTube video, Joey Lancianese boogies down to a medley that includes the requisite Bruno Mars' song "Marry You," before finally popping the question to his long-time girlfriend, Alex DeLoia.

Lancianese had to close down an entire street in Sewickley, Penn., to pull off the romantic stunt. According to KDKA, the young man spent two months planning the spectacle, telling DeLoia he was busy playing softball whenever he had dance rehearsals.

"I'm a big believer that I want to do this one time and with the right person," he told the Pittsburgh Tribune-Review before the event. "I want to make it as epic as possible."

DeLoia fell for the elaborate ruse and said she was caught by surprise. She told KDKA she thought she was having dinner with Lancianese and a few friends when he suddenly broke into the dance routine.

The flash mob's performance took place on Saturday -- which was also National Dance Day -- and lasted for several minutes. For the finale, dancers, family members and friends formed a passageway for Lancianese to walk through toward his blushing bride-to-be.

"It's a little understated, I understand," he said laughing, as he got down on one knee.

"No idea is too big for us. We can do anything together. You are my best friend in the whole world, being with you has seriously been the happiest time of my entire life," he continued.

Through tears and laughter, DeLoia accepted his proposal.

"I'm completely speechless," she told the Pittsburgh Tribune-Review. "I guess I wouldn't have expected anything less. I mean, I knew it wasn't going to be a restaurant proposal."

Though Lancianese's flash mob proposal might be one of the most elaborate we've seen lately, his is not the first to use Bruno Mars' hit song to pop the question.

Here's a slideshow of some of our favorite "Marry You" proposals:

Best Bruno Mars "Marry Me" Proposal Videos

Note: Though CBS News has spelled the groom-to-be's last name as "Lanianese," here we have followed the spelling used in his Facebook account.

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