Nick Jonas dreams about marrying the perfect woman - and often discusses his plans to wed with brother Joe.

The 16-year-old singer, who has dated Miley Cyrus and is now rumoured to be going out with Disney star Selena Gomez, wears a purity ring to signify his no-sex-before-marriage rule.

But the star is eager to settle down, and spends hours talking about his future with his 19-year-old brother.

He tells Britain's Sunday Times, "Marriage is something that's going to happen. Music is important, but family is most important.

"When Joe and I lie in our bed and we can't fall asleep because of all the time changes, that's the kind of thing we talk about."

And eldest Jonas Brother Kevin, 21, is also looking for the perfect girl to spend his life with.

He adds, "(My ideal girl is) someone who wears nice clothes and can put themselves together. Even if she is going to the beach she might put a flower in her hair.

"You need to be faithful to who you're with. Cheating is not good."