everywhere i go on here people are saying that basically without 30 minutes of cardio everyday you will never lose the weight you want. well i want to know if i can still lose the weight i want by doing these:

either 20 minutes of cardio, 20 minutes of strength/cardio interval training, or 30 minutes of a cardio burn sculpt workout (different one each day, rotating between them)
and then 20-30 minutes of pilates/toning

by doing this everyday, along with my dance schedule and a healthy diet will i be able to look really really good in a bikini by summer? i am currently 5'4" and 113-117 lbs.
do i seriously HAVE to do 30 minutes of cardio EVERYDAY to meet my goals?