I found this free pattern online and fell so in love with it I had to make 3 in two days. The one on the right I made from a thrift store T-shirt that I bought specially and the other two are Kevin's old ones that had holes. The yellow one especially will be cute to see baby in because Kevin used to wear that shirt all the time.
This is where I got the pattern:
http://thismamamakesstuff.blogspot.com/2008/08/tutorial-t-shirt-to-newborn-gown.html