because, in portuguese we say 'a maquina de costura' (the sewing machine), so we need to have an 'a' before the noun. So, that makes the noun female xD
I 愛 loads, ビヨンセ and リアーナ are probably my favourite artists to listen to if I'm honest. But cheryl cole's my favourite person, if あなた see what i mean, she's my idol, but i 愛 her 音楽 as well :)