what is the best ab workout dvd?

you can say I'm pretty thin. I'm 5'3 and I weigh 89 pounds. and yes I know I'm underweight but since April I have been dieting (from an average of 2,000 calories a day I went to 1,200 calories a day) and started doing hip hop abs starting on the last week of April 'til now. I have only lost 1 inch off my waist in 2 weeks and now It's only 2 days 'til my 1st month doing it and I am not seeing any progress. I did not even lose 2 pounds in the whole diet and workout thing. losing weight and getting thinner is not my goal but to GET ABS. I've also read some reviews on hip hop abs and they said that if you are fit already it won't help you so can you suggest effective ab workouts that can give me fast results? I also plan on jogging at least twice or thrice a week :)