Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: "The Messenger of Allah (peace and blessings be upon him) cursed the woman who attaches hair extensions and the woman who has them attached, and the woman who tattoos and the woman who has herself tattooed."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10271