WHICH MICROPHONE DO I REQUIRE TO FIT MY LENOVO LAP TOP G575 MODEL 4383?

Any with a USB connection is designed to work fine.
If you want one for the microphone port (3.5mm or 2.5mm coax plug), see Lenovo customer support as to what your laptop will support. My guess is a condenser microphone.

ANYONE NOW STOP USING CAPS YOU F***ING F*****