Another day, another Amazon sale , right? Not quite. Starting today, Amazon’s kicking off summer early with its Summer Beauty Event — and it’s not like any other sale we’ve seen from the online mega-tailer. Alongside up to 30% off makeup, hair, skincare, and more from today until May 10, there will be flash deals across selected categories; this is where you can expect the steepest discounts — but you’ll need to act fast since each deal will only be live for 48 hours. (Trust us, they’re more than worth the planning and iPhone alarm-setting.)   The calendar of flash deals rolls out in waves, kicking off today and tomorrow with up to 50% off makeup, followed by up to 40% off fragrance on April 29–30. From May 1–2, health and wellness products are discounted by up to 50%, with men’s grooming deals of up to 50% off landing May 3–4. Skincare takes the spotlight May 5–6 with up to 40% off, then hair care gets up to 45% off May 7–8.…