When Isaac Lamb decided to propose to his girlfriend, Amy, he knew he wanted to do something over-the-top. but not even Amy was prepared for the elaborate proposal he staged with 60 of their closet friends and family members. The video went viral - and has already amassed almost 6 million views on YouTube at last count.

Check out Isaac's incredible proposal - set to Bruno Mars' "Marry You."

The video even got Bruno Mars' stamp of approval!