United Kingdom, Jan. 23 -- Harry Styles' sister doesn't care about his fame.

The Aperture singer is happy to call Gemma Styles one of his "best friends" because no one knows him as well as she does and he thinks they have a "beautiful" bond.

Asked who is least impressed by his fame, he told BBC Radio 2's Scott Mills: "My sister.in like the most beautiful way, in the way that makes me feel so wonderful and loved by her. It's not what we talk about. It's just in a way that it makes me so full.

"She is not that bothered [about the fame].

"I also think as you get a little bit older as well and you have siblings that then you choose to be friends with, ends up being like a really beautiful friendship in your life. She's one of my best frie...