http://www.southendopenmarket.com/about_us.htm South End Open Market Boston What: The citys urban market gets underway for the summer with everything from homemade breads and flowers to antiques and D.I.Y. crafts. Why: Market value. When: Opening celebration, Sat. & Sun., 10 a.m.-5 p.m. Then every Sun., 10 a.m.-5 p.m. Thru Oct. 29. Where: 540 Harrison Ave. Katrina Hess Spring Makeovers What: The revered local makeup artist just got back from London with this seasons tricks and trends. Why: Put your best face forward. When: Two hours before you need to be somewhere, looking smashing. Where: Katrina Hess Makeup Studio, 105 Newbury St., 3rd flr. (781-710-6865). Making Marathon What: Twelve of Bostons top stylists will cut, blow-dry, and color for up to 50 percent off to benefit Susan G. Komen Breast Cancer Foundation. Why: Play tress-up. When: Sun., 11 a.m.-5 p.m.Where: I-Soci Salon, 8 Newbury St., 3rd flr. (617-867-9484).