I'm not sure what the winner would get...but pretty much 24 people start. Perhaps first round will be a 2 person poll to weed out the "scrawny" ones.
Then Final 12 go through a series of challenges, who ever wins each challenge gets to choose who they kill?
On Valentine's Day we think of those
Who make our lives worthwhile,
Those gracious, friendly people who
We think of with a smile.
I am fortunate to know you,
That's why I want to say,
To a rare and special person:
Happy Valentine's Day!
Does anyone here watch Grey's Anatomy? I just started watching a few weeks ago and now on Season 5. I LOVE IT! 
Here's a cute poem I found on the net.