Mix three groomsmen, a tiger and major memory gaps, then subtract one tooth and you’ve got the ingredients for the most popular On Demand film in the delivery system’s history.

Avail-TVN has put together a list of the 20 most-watched video on demand titles and “The Hangover” tops the list. On Demand viewing has grown exponentially in the last three years, with titles often bowing the same day as the DVD goes on sale, so it’s not too surprising that the list is made of recent films. (None was released earlier than 2007.) There are some surprising omissions, though. No Disney-Pixar film made the cut, for example.

Read more (and see the Top 20) at Variety’s Technotainment blog