In high school we had a saying "Curls are for Girls".
This workout is loaded with plenty of curls and you are sure to impress the lady in your life with your muscular arms if you do this workout on a consistent basis.
This workout is a repeating, alternating workout: shoulder, biceps, triceps over and over until your arms are fully pumped and feel like they are about ready to fall off.
If you loved the pumped up feeling of your muscles after a workout, then you will love P90X: Shoulders and Arms.
Here is the rundown of the exercises in P90X Shoulders and Arms:

1. Cardio Warm-up and Stretch
2. Alternating Shoulder Press, In & Out Bicep Curl, Two-Arm Triceps Kickback - Repeated 2x.
   
3. Deep Swimmer's Press, Full Supination Concentration Curl, Chair Dip - Repeated 2x.
   
4. Upright Row, Static Arm Curl, Flip-Grip Twist Triceps Kickback - Repeated 2x.
   
5. Seated 2-Angle Shoulder Fly, Crouching Cohen Curl, Lying Down Triceps Extension - Repeated 2x.
   
6. BONUS ROUND: In & Out Straight-Arm Shoulder Fly, Congdon Curl, Side Tri-Rise - Repeated 2x.
   
7. Cool Down and Stretch

My Favorite Exercises in Shoulders and Arms: Shoulder: Alternating Shoulder Press - it is first off in the workout when my arms still feel fresh so I can use heavier weight.
Biceps: Static Arm Curl - use the right weight and this exercise is a pumpin', burnin', killer bicep exercise.
Triceps: Side Tri-Rise - at the end of the workout, I have to dig down deep to get through the exercise.
Like I have said before, one of the real benefits of following along in the video is that you move from exercise to exercise which helps to keep your heart rate up and burn more calories.
By the end of P90X: Shoulders and Arms, if you go hard you will get an awesome pump and definitely sculpt your arms with some consistency! Note for Beginners: Really focus on form.
Don't get hung up on the numbers.
If you are trying to increase size pick a weight that challenges you to finish 8-10 reps.
If you are trying to slim it down, make sure that you are finishing 12-15 reps.
Also, take Tony's advice, "Do your best, and Forget the rest"! Note for P90X Grads and Superfit: If you are cycling back through the program for the 2nd, 3rd, or 4th time and your already lifting a good amount of weight, try doing your reps on a BOSU trainer or on one leg.
When adding a balance component, you may have to decrease your weight, but you won't be able to cheat and you will incorporate more core muscles into your routine.
Give P90X a try! Good luck on your journey! David Hawkins PT, CSCS