Disney is perhaps best known on YouTube for clever fan mash-ups and Hannah Montana videos. Riding this wave, Disney's theme parks division figures a little impromptu singing and dancing on its well-groomed Main Street, U.S.A., will create yet another "magical moment." But winning over YouTube critics takes more than a happy song as Disney learns.

Title: Disneyland Musical Marriage Proposal

Stats: Appearing on June 8, this video has attracted more than 265,000 viewers and over 3,600 text responses.

What you see: A couple are walking along a crowded street in a Disney-designed downtown when the man steps forward, whips out a megaphone, and asks his girlfriend to marry him. She just shrieks and holds her hand over her mouth as he goes into a full song-and-dance routine of wedded bliss. She says very little—just an "Oh my God"—and seals the proposal with a kiss. A happy ending. The crowd cheers.