Omnivore? Carnivore? Vegetarian? Pescatarian? Gluten-intolerant? Lactose-intolerant?
That doesn't matter! What you eat is entirely up to you.
BUT -
- a full stomach can make you feel sluggish
- an empty stomach can rob you of energy and concentration
Stay hydrated - in singing as in any other activity.
- bring water and sip as you need to
- room-temperature water is best. Cold water constricts your vocal chords.