Dying my "cappuccino" brown hair barbie doll blonde

I have also dyed my hair from raven black back to barbie doll blonde before (about 5 years ago) and don't quite remember if I used the Superblonde bleach ($15 @ walgreens) once or twice when lightening it. I am just asking whether I should bleach my...

dark brown hair twice (once to get the orange color, then again to get the white/banana yellow color), like I did when it was black. After that I then add my Les Blondessines color in natural blonde on top of everything that gets it barbie doll blonde. Or should I just bleach it once ( leave it on for 60 minutes- my hair can take it) then add the natural blonde permanent color on instead?
I'm scared of bleaching it twice (because of the drying it causes) although my hair is a cappuccino dark brown, it's in excellent condition, I have tons of salon conditioner product to put on for weeks after the whole bleaching process.
Thanks for the help, I want to start dying my hair a.s.a.p,

I would say get it done by a hair saloon then you will have no worries and end up with what you wanted. I use to use the box ones but I will tell you if you don't get it right it sure is a nightmare and to keep doing it over and over really dries out your hair.