Does Take That write their songs on their own?
Yes, they write a lot of their own material. They are very talented musicians.
Alicia Keys does write some of her songs, but mostly other songwriters write songs for her to sing. Yes, in Alicia's albums it says that she wrote them, but the writers just get agree to let her take credit and that way, the songwriters get the money when the singer agrees to take it. It's outright, not copyrighted.