Summer Fridays CC Me Vitamin C Serum The two forms of vitamin C inside this Summer Fridays CC Me Vitamin C Serum ($64) make its brightening twice as nice. In fact, along with help with dullness, dark spots, and hyperpigmentation, the serum also packs squalane and peptides for smoother, more hydrated skin, too. Image Source: sephora.com Summer Fridays CC Me Vitamin C Serum $64 from sephora.com Buy Now