Answer:
I am a rock group with four members. All dead one was assassinated.
I come in different colors and shapes. Some parts of me are curvy some are straight. You can put me anywhere you like but there is only one right place for me.
There are four of us but it seems like everyone loves spades the most.
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
What kind of room has no doors or windows?
No matter how little or how much you use me, you change me every month.