• Meet John Kressaty, 3LAB chemist and skin-care authority, at his first appearance at Barneys. Call to set up your private skin consultation. Barneys New York, 660 Madison Ave., at 61st St. (212-833-2010); Wed. (112).
• Get a free makeover today and tomorrow, as John Frieda Salon sets up shop downtown with a mobile hair salon. Frieda himself will make an appearance both days, and celebrity hairstylist Harry Josh (to Sarah Jessica Parker and Fergie) will offer tips. Through 6/26. South Street Seaport, 106.
• Alexander Wang is having a spring sample sale with loads of cool black dresses and loose denim. Through 6/26. 386 Broadway, at Walker St.; Wed. (37); Thurs.(107).
• Bring out your inner girlie girl on Betsey Johnson’s sample sale. Dresses are down to $87 (orig. $345), and tops are $55 (orig.$220). Through 6/26. Millennium Broadway Hotel, 145 W, 44th St., nr. Broadway, Seventh fl.; Wed.Thurs. (107:30).
• The Memorial Sloan-Kettering Cancer Center Thrift Shop got in a special shipment of Chanel blouses, dresses, jackets, skirts, and pants for you to scoop up today only. 1440 Third Ave., nr. 81st St. (212-535-1250); Wed. (105).
• Sandals, heels, and more, from Hollywould’s cruise collection, are up to 80 percent off. Through 6/30. 198 Elizabeth St., nr. Prince St. (212-219-1905); Thurs.Sat. (11:307); Sun. (noon5).
• Society for Rational Dress, Diabless, Vivienne Westwood, and Morphine Generation are all 20 to 75 percent off at the Woodley & Bunny sale. 490 Driggs Ave., nr. N. 9th St. (718-218-6449); Daily (noon8).
• With this three-day sale, you’ll only have to pay $5 to $60 for clothes from Soundgirl, or pay $40 to $60 for Shoes for Lovely People. Through 6/27. 1385 Broadway, nr. 37th St., Fifth fl. (212-730-0377); Daily (106:30).
• The Brian Reyes and Tashkent by Cheyenne sale starts today. Through 6/26. Tashkent Studios, 939 Eighth Ave., nr. 56th St., Ste. 501; Wed.Thurs. (117).
• Elaine Turner handbags are up to 75 percent off. The Eva Sand Dollar beach bag that was $150 now is $50, and python clutches that were $650 are only $195. Through 6/26. 320 Fifth Ave., at 32nd St., Ste. 1102. (212-239-8966).
• United Bamboo’s spring/summer 2008 collections, as well as previous collections, are up to 90 percent off retail. Through 6/28. 217 Centre St., nr. Grand St., Sixth fl. (212-925-3311); Thurs.Fri. (107), Sat. (127).
• The Akris trunk show ends tomorrow at Bergdorf Goodman. Through 6/26. Bergdorf Goodman, 754 Fifth Ave., at 57th St., Fourth fl. (212-753-7300); (108).