Dress & Attire

Q: I have a baby girl and we cut her hair. At what age should we stop cutting her hair and grow it long?

Q: Removing hair from the back passage is very difficult, as i cannot see. At times najaasat gets stuck to the hair since it is long in that area. How can I cut it easily?

Q: Is it permissible in Islam to have a tattoo on one's body? I performed salaah behind a person who has a tattoo on his skin. Is the salaah valid?

Q: Is it permissible to cut one's hair 2 lengths?

Q: It has been brought to my attention by a very close friend that there are contact lenses on the market, which if you wear it, your eye color changes, will this be Jaiz cause we are changing something which Allah Ta'ala has given us as a bounty.

Q:

1. Is it ok to wear jeans under burqa/abaya for a girl?
2. Is it ok to wear shalwar kurta for a boy as it sometimes resembles a girl from back?

Q: If a person has a tattoo which is into his skin,will his ghusl be valid?

Q: Is it permissible to shave the moustache completely off?

Q: With regards to keeping a beard. It is Waajib? Does this ruling only apply to the Hanafi madhab? I have a family member who follows Imam Shafi'ee and he would like to know the ruling.