40 days and 40 nights

My last challenge ended January 1st, 2011. I went all of 2010 without wearing pants, only skirts and dresses. I want a new challenge.
In 40 days my cousin Jessica is getting married! Zane and I will be at her wedding in Wisconsin. I am going to be in a pretty dress. I will do my hair nicely. We will see all our family and take many pictures and be in many pictures.
I do not want to be at the weight I am in those pictures. I also do not want to be huffing and puffing on the dance floor.
I challenge myself to work out everyday for the next 40 days.
The rules:

1. Break a sweat at least once every day.

2. Have an elevated heart rate for at least 20 minutes everyday.

3. Do a workout (of Zane's choosing) at the gym every 5 days. It must last 1 hour at least.

The goals:

1. Not miss one day of working out.

2. Lose some weight.

3. Have a great time at the wedding and not be worried about how I look.