07/08/2011 10:19 am ET Updated Sep 07, 2011

Rihanna On The Cover Of 'Cosmo' UK, Talks About What She Wants In Relationships

With every jaw-dropping performance, planned or otherwise, Rihanna's sex-appeal only appreciates.

So, there's one question on the minds of fans: how is it possible that this goddess is single? And, more importantly, what does it take to woo the sexy R&B star?

UK Cosmopolitan endeavors to get to the bottom of this in their August issue. With a slew of headline-making relationships, from baseball stars to rappers--for better or worse--now Rihanna is "ready for love" and knows what she wants.

"I'm turned on to a guy by different things. It could be the way he looks. It could be his intelligence. It's really a spontaneous thing," she tells Cosmo.

Winning her heart, though, isn't all chance; when it comes down to it, the singer wants a man who will show that he's serious.

"But guys should have to earn it. Because the minute they get it, they want something else," she explains. "Men are like hunters: they like the chase. So you have to keep 'em guessing. Actually, I'm like that too. I get bored quickly. So if someone can make me laugh, that's the best."

Rihanna also talks about her painful relationship with Chris Brown.

"It was a very aggressive and defensive time, and that allowed me to start not giving a sh*t. I walked around with a very f**k-you attitude," Rihanna says. "I've always been good at masking my emotions. For me, it's tougher to be vulnerable than to be tough."

For more, click over to Cosmo.