Sunan an-Nasa'i Book 48, Hadith 59
A woman came to 'Abdullah bin Mas'ud and said: "I am a woman with little hair, is it alright for me to add extensions to my hair?" He said: "No." She said: "Is it something that you heard from the Messenger of Allah and I find it in the Book of Allah." And he quoted the Hadith.
"The Messenger of Allah said: 'May Allah curse the woman who affixes hair extensions and the woman who has that done.'"
"The Messenger of Allah cursed the women who do tattoos and the women who have them done, Al-Mutanammisat, and the women who have their teeth separated for the sake of beauty, those who change (the creation of Allah.)"