Chris Brown -- His Baby Has a Model Mother

If nothing else ... Chris Brown was swimming in the right end of the gene pool when he knocked up his baby mama -- as evidenced by these pics.

As we told you ... the mother's name is Nia -- a 31-year-old from Texas who used to do some modeling, and she also appeared in music videos. We're guessing that's how she first hooked up with Chris years ago.

Check out the photo gallery of her from back in the day. Chris' baby is blessed.