Tarte is celebrating its 17th birthday with seven days of big surprises, and we can hardly take all of the goodness. Today, for one day only, the cosmetic brand is offering up to 70 percent off on some of its most popular products. We're talking makeup palettes, mascara, lipstick, highlighter, brushes, and a whole lot more. We rounded up the 12 best deals that are getting us the most excited. You have just hours to take advantage of these major discounts, so we suggest buying these goodies fast. You don't want to have FOMO when the sale is over!