What's it all about then, National Lipstick Day? National Lipstick DayPic: SuppliedIf you haven't heard of MAC Lustreglass Sheer-Shine Lipstick, then you are missing out. MAC Lustreglass Sheer-ShinePic: SuppliedMAC has developed a creamy, soft formula that hydrates all day long. What To BuyPic: SuppliedBrown Thomas and Arnotts are running their 20% off National Lipstick Day promotion until 2 August, after which normal pricing will resume. If you are looking at getting the MAC Lustreglass while it's on sale, we suggest getting $ellout, Well, Well, Well, or Thanks, It's MAC before they are gone after National Lipstick Day.