Hello!
I am being classically trained in voice. And with all my heart I respect and love classical music but have recently started to love rock! Particularly Within Temptation! And I have been told that classically trained at least for females rarely use their chest voice when singing. Does that apply to rock-ish music? Do you go between chest and head voice when singing it? Or whatever sounds best?

I'm know a little bit for head voice. If you use the right way to proceed head voice, therefore you can get your own best vocal...The sound your voice makes, can have a positive or negative cumulative impact on your life and your future. Having a "head voice" refers to the voice being nasal and high pitched in quality because the sound isn't being projected from the solar plexus just below the chest, but is instead projected from the back of the head.

From what I have heard and read, most rock singers don't actually "sing". It's more like you're screaming words. If you're talking about soft rock or pop rock however, most of it tends to come from chest voice for men. (Rarely will you ever hear them sing in falsetto.) Women tend to be better at blending the vocal range, so depending on what band you're listening to, they could very well be using both ranges. In rock, pretty much anything goes. I'd just go with what sounds best for that song. There's no "right" way to do things in this genre or in any really. It's good that you have been classically trained because the breathing applies to everything. Hope this helps!

For men head voice is not falsetto. Sorry, just a little but crucial remark.

A "chest voice" will limit your vocal range. There are many 'rock' musicians who are claissically trained in using their voices. Queen was the first group I know of who were classically trained and then went into the rock genre. Many, Many, Many rock singers after that hired classic and opera coaches to help them with their voices.

Singing incorrectly will limit you abilities and the number of years you can keep singing. With a properly trained voice you will be able to do more with less energy, save your voice for years, and be able to manipulate yoru voice to soudn as you would like it to.

Yes, some singers use their chest voice, but again they are limited to range and have one color only. Unless you have a very unique chest voice - don't.