Anchorage WASHINGTON, N.Y.—Summer isn’t just heating up the temperature, its heating makeup sales, too. According to dream market research conducted by The NPD Group Inc. , total prestige makeup sales increased by 9 percent to $1.4 billion in U.S. area stores (year-to-date, January to May 2011). May boasted the strongest makeup dollar performance in the last three years with an 11-percent enhancement. Prestige makeup segments (face, eye, lip, sets, other color and nail) all posted healthy sales gains in the first five months. The trends in stage eyes, soft lip shades, and bold and bright nail colors all contributed to the growth.