We didn't find out what we were having before delivery, but our daughter knew the whole time. This is the video of our daughter meeting her baby brother for the first time. You can also hear my sister-in-law finding out too. :)
The video shakes really bad after my daughter says it because my sister-in-law gave my husband (filming) the biggest hug.
Oh and the baby weighed 7 pounds 3 ounces, the same as my daughter. :D