Live Sampling, What's the cleanest fasted way Options

[Psychoprick]

Hey,

For a music project I want to be able to make live samples/recordings with my Mac.

I'll be singing playing guitar live. Use a beat/bass sequence created in Logic.
On top of that I want to be able to create instant samples of lines that I play/sing with the touch of a button.

What's the easiest way of doing that? what kind of software do you recommend?