Whats a good abdominal workout?

Hi,
so.. im 14 almost 15..
and i love to work out.. i have a nice body im not fat at all…
and i found a very good workout for every muscle
except abs, and id like to have good abs
kind of like Randy Orton
does anyone have any good workout rutine to get those?
please do not advertise!
the 4th question is the best one so far!
if by any chance i forget to pic an answer please vote that one! the one that doesnt have any links that explains the exercises and says that he wont advertise at the top