Justin Bieber, David Letterman

Justin Bieber said he knew what he was dealing with when Mariah Yeater slapped him with a lawsuit claiming he fathered her child.

"I could smell a weasel," the 17-year-old pop star told David Letterman on Wednesday's Late Show. "I'm 17, but it's going to happen. Being in the spotlight, people can say whatever."

Paternity suit against Justin Bieber dropped

Even though Yeater eventually dropped her suit, Bieber recently took a DNA test and said he he plans to sue Yeater, 20, once the test results show her assertions are bogus. Bieber and his team want to file suit against Yeater to show there are consequences when such allegations are made. Bieber's team will not settle or discuss settlement with Yeater or her lawyer.

Check out Bieber's appearance on Letterman's Late Show: