Allah and his Prophet have cursed the woman who removes the hair from her eyebrows. Learn to love your eyebrows and have fear of Allah and obey him, it is not that important its really not, and you shouldn't be worried about that either because Allah created you perfectly.
Narrated 'Abdullah: Allah has cursed those women who practise tattooing and those who get themselves tattooed, and those who remove their face hairs (eyebrows), and those who create a space between their teeth artificially to look beautiful, and such women as change the features created by Allah. Why then should I not curse those whom the Prophet has cursed? And that is in Allah's Book. i.e. His Saying: 'And what the Apostle gives you take it and what he forbids you abstain (from it).' (59.7) - Bukhari