Describe how Guillaume de Machaut's Notre Dame Mass reflects the aesthetics of the ars nova.

i've never seen you when you're smiling

it really gets under my skin

you say it's easy when it's faster

i still can't guess what you're after

it's the colour of your skin

your skin is black metallic

it's the colour of your skin

your skin is black metallic

your skin is black metallic

your skin is black metallic

i think of you when you're sleeping

of all the secrets that you're keeping

you can't stay all day under the covers

'cause under there you'll discover

it's the colour of your skin

your skin is black metallic

it's the colour of your skin

your skin is black metallic

your skin is black metallic

you're turning black

it's the colour of your skin

it's the colour of your

your skin is black metallic

your skin is black metallic

your skin is black metallic

you're turning black metallic

it's the colour of your skin

your skin is black metallic

your skin is black metallic

your skin is black metallic

your skin is black metallic

your skin is black metallic

your skin is black metallic