Valentine's Day may seem like the unofficial "engagement day," but for the last several decades, March 20 has been celebrated as National Proposal Day. That's right: today's the "official" day to pop the question!

In honor of National Proposal Day, we've compiled a list of the top 10 best proposals of all time. These romantic men found innovative ways to ask their significant others to marry them that, in some cases, launched dozens of copycats (flash mob proposal, anyone?). Their brides- and grooms-to-be won't forget these proposals any time soon, and neither will we.

Click through the slideshow below to see our picks for the best proposals of all time.

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  • Downtown Disney Flash Mob

    Jamin brought a little Disney magic to his proposal when he <a href="http://www.youtube.com/watch?v=Su1YLAjty-U" target="_blank">organized a flash mob</a> in Downtown Disney in 2011.

  • "Julie Will You Marry Me" Website

    In 2011, Jim worked with an artist to create a comic strip-like history of his and Julie's relationship, which ended with a marriage proposal. He posted the drawing on a <a href="http://www.huffingtonpost.com/2011/07/19/cutest-marriage-proposal-ever_n_903657.html" target="_blank">website</a> and filmed Julie's reaction as she read it. Click <a href="http://juliewillyoumarry.me/" target="_blank">here</a> to see the adorable website, and watch the video at left to see Julie's reaction.

  • Romantic Proposal On A Dock

    Do proposals get any more romantic than this? In 2011, Tyson <a href="http://www.youtube.com/watch?feature=player_embedded&v=TECPJI6Z2gs" target="_blank">led his girlfriend, Michelle, to a picturesque dock</a> in Oregon, where their friends were waiting with flowers. They were serenaded by a guitarist as the groom-to-be popped the question.

  • Buzzfeed Meme Proposal

    Len Kendall has the entire internet to thank for helping him pop the question to his girlfriend, Katie, in 2012. Kendall posted a meme-like photo of himself (look left) proposing to Katie on <a href="http://www.buzzfeed.com/lenkendall/help-me-convince-katie-to-say-yes" target="_blank">Buzzfeed</a>, and started a Facebook group, Pinterest page and Twitter hashtag #SayYesKatie to urge others to create their own memes asking Katie to marry him. Click <a href="http://www.huffingtonpost.com/2012/02/29/say-yes-katie_n_1310729.html#s740651&title=Len_Kendalls_Proposal" target="_blank">here</a> to see some of the best memes created for Len and Katie.

  • Madison Square Park Proposal

    One man pulled out all the stops for his proposal in a park in 2010, including <a href="http://www.youtube.com/watch?feature=player_embedded&v=bQVoAWSP7k4" target="_blank">dancers, huge signs, a unicycle, and streamers</a>. After she said "yes," the happy couple rode off in a horse-drawn carriage.

  • White House Gay Marriage Proposal

    U.S. Marine Corps captain Matthew Phelps and his partner, Ben Schlock, made history in 2012 by becoming the <a href="http://www.huffingtonpost.com/2012/12/17/white-house-gay-marriage-proposal-_n_2317455.html" target="_blank">first gay couple to become engaged at the White House</a>. Phelps told HuffPost that he wanted to propose at the White House because they had their first date there, at the LGBT Pride Month Reception, six months earlier.

  • Isaac's Live Lip-Dub Proposal

    In the <a href="http://www.huffingtonpost.com/2012/05/29/portland-proposal-video-e_n_1554435.html" target="_blank">first viral lip-dub proposal</a> (but <a href="http://www.huffingtonpost.com/2012/10/01/epic-lip-dub-proposal-brad-emily_n_1929700.html" target="_hplink">not the last</a>), Isaac Lamb had his girlfriend sit in the back of a truck as they drove through a Portland park, then played Bruno Mars' "Marry You" while dancers popped out and lip-synched to the song. The proposal, which took place in May 2012, now has more than 18 million views on YouTube.

  • Meme Proposal

    Tim Tiah proved just how useful those popular internet memes can be when he proposed to his girlfriend, Audrey, in 2011. While Audrey was at a restaurant with friends, Tiah stood outside and <a href="http://www.huffingtonpost.co.uk/2011/12/22/meme-filled-marriage-proposal-video_n_1164674.html#s567043&title=Song_And_Dance" target="_blank">held up signs containing memes</a> that corresponded to their relationship, ultimately using the <a href="http://www.quickmeme.com/Puss-in-boots/?upcoming" target="_blank">Puss In Boots meme</a> to pop the question.

  • Fake Movie Trailer

    Back in 2011, Matt Still convinced his girlfriend, Ginny, to go to the movies one day -- then, he arranged to <a href="http://www.youtube.com/watch?feature=player_embedded&v=pnVAE91E7kM" target="_blank">play a fake movie trailer</a> before the movie that chronicles his journey to the theater to pop the question.

  • "Mobbed" Flash Mob

    In 2011, <a href="http://www.fox.com/mobbed/" target="_hplink">Fox T.V. show "Mobbed"</a> featured an epic marriage proposal. Groom-to-be Justin <a href="http://blog.weddzilla.com/topics/getting-engaged/get-mobbed-on-fox/" target="_blank">recruited 1,000 people</a> to participate in an over-the-top flash mob for his girlfriend, Nikki.

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