Hi Gabrielle!
It is never recommended that you lose more than 1 to 2 pounds of body weight per week. If you lose weight at a rate faster than this, you will most likely be losing the wrong stuff(for instance, bone mass, exceptional amounts of water that lubricate your joints and feed your organs, and vital nutrients---just to name a few).
In your quest to burn off extra body fat at the rate of one to two pounds per week, I would recommend doing the following:
1) Two high intensity cardio workouts per week(some examples: indoor cycling, power step, running).
2) Two lower intensity workouts per week(some examples: step tapes labled moderate to advanced, light jog/walk programs, stationary bike set at level 1, 2, or 3 for 45 minutes.
3) One interval workout per week
4) One to two(total body)strength training workouts
5) One full day off to recover.
Good Luck!