Christina Milian

He signed Christina Milian back in February to his Radio Killa Records, and less than six months later, the two musicians are coupled up and engaged ... officially.

In June, we reported that the couple threw a private engagement party in Las Vegas, and today, Milian is showing off the ring.

Check out our photo gallery  for pics of the future Mrs. Nash rocking that huge rock on her finger with a big smile on her face.

Story Credit: Ballerstatus/Liz "Red" Thomas