The singer-and-actress, 18, who has previously dated singer Nick Jones and "Twilight" star Taylor Lautnerm, says she would never date the 16-year-old pop star because it would be too "weird".
"Oh brother! He's little. No, he's like my little brother. It's weird to me," femalefirst quoted her as saying.
Recently she said that she hasn't been on a date in six months.
"Unfortunately, I haven't been on a date in over six months. In hindsight, it doesn't really seem that long between dates. The truth is I haven't met anyone, but I'm young. I don't need to have a boyfriend right now."
"Any crush or relationship is always a big ordeal. To get that one boy to like you and then if he doesn't it feels like the end of the world. I figure that you will have about 1,000 dates until you get to your perfect guy."