Hi!

Could someone give me a 3 excersize ab-routine that they know work. Would like it to be "extra weight" related.

The three ab exercises that I like the most are:
1) Leg lifts
You can add weight by holding a dumbell between your feet. You can either do this laying on the ground or on an angled bench.

2) Swiss ball crunches
I do this with a plate behind my head. Keep your feet close together to work more stabilizer muscles by having to balance during the routine.

3) Weighted cable crunches
Using a cable machine, get on your knees and keep the grip at a fixed spot behind your head. Perform the exercise by bringing your head and shoulders towards your knees keeping your lower body as still as possible.

Crunchies.

my three favorites are:

1) crunches
2) reverse cruches
3) "the plank"

Here is an excellent article and routine (http://www.bodybuilding.com/fun/likness28.htm) wrtten by our own Jeremy Likness on building a great core. Pay special attention to the "vacuum" and the Kegels during your reps; they'll make all the difference between looking lean and looking like you tried to add muscle mass to your stomach. :D