For a $10 donation to the National Breast Cancer Foundation and the American Cancer Society, anyone can show her (or his!) support by wearing a pink hair extension in the annual Pink Hair for Hope fundraiser, being held at Believe Salon in Pleasantville (395 Manville Rd, 914-747-0778; www.believebeautylounge.com). The extension is bonded to your natural hair very close to the scalp, using 100-percent keratin, so there is no damage to the natural hair once the extension is removed. Now through October 31; $10 donation per pink extension; cash donations only. All proceeds go to the cause; appointments are recommended.