updated 02/11/2013 AT 10:00 AM ET
•originally published 02/11/2013 AT 11:30 AM ET
The Brazilian beauty introduced 9-week-old daughter Vivian Lake Brady in a Facebook posting last Friday, when she was also displaying her washboard stomach while vacationing poolside at her hotel in Hawaii.
As for her figure, the supermodel said to Vogue U.K. in 2011, “Like I tell my five sisters, who don’t work at it very hard at all, whatever you put in, you get out. I’m not afraid of working hard at anything, whatever it is. I just always want to be the best that I can.”