The best wedding proposal ever? YouTube video set to take the web by storm - and melt even the coldest hearts

'Isaac's Live Lip-Dub Proposal' is the talk of the web after being posted online yesterday

Oh brother! Isaac's sibling starts the show off by banging a saucepan after giving Amy some headphones to wear

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It's the romantic marriage proposal that's set to melt even the coldest hearts - and become a YouTube viral hit.

Two days after asking his girlfriend to marry him, 'Isaac's Live Lip-Dub Proposal' is the talk of the web after he posted it online yesterday.

After racking up several thousand views in just a few hours it was a global hot topic on Twitter today with many calling it "the best proposal ever".

The 5minutes 53seconds long video starts with the message: "On Wednesday, May 23, 2012, I told my girlfriend, Amy, to meet me at my parent's house. When she arrived I had stationed my brother to sit her on the back of a Honda CRV with some headphones on. He 'wanted to play her a song'.

"What she got, instead, was the world's first Live Lip-Dub proposal."

To the sound of Bruno Mars' 'Marry You', Amy is then serenaded by her and boyfriend Isaac's friends and family as her car moves slowly along the street.

Surprise! Another couple jump out and start dancing before handing Amy some flowers

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Family affair: Relatives and friends jump into view to take part in the dance

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Dancing in the street: The proposal begins

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Watching online: More friends and family take part via webcams

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As the song finishes, Isaac, from Portland, Oregon, emerges through a tunnel of people and asks Amy for her hand in marriage.

Man in black: Here comes the boyfriend

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Down on one knee: Isaac gets ready to pop the question

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She says yes! The happy couple embrace to applause

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Tender moment: Isaac and Amy are set to be husband and wife

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She says yes and the happy couple embrace to great applause.

The video ends with the following message from Isaac: "To the 60+ friends and family who helped me put this together: Thank you. You'll never know the extent of my gratitude.

"And to my sweet pea.. thanks for saying yes."

Is it the best you've seen? Let us know below.

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