In this undated image released by Beyonce.com, Beyonce Knowles holds her daughter, Blue Ivy, now one-month old. The photo was one of five posted by Beyonce and Jay-Z on the Tumblr photo blog helloblueivycarter.tumblr.com. A hand-written note accompanying the photos reads, "We welcome you to share our joy. Thank you for respecting our privacy during this beautiful time in our lives. The Carter Family." Jay-Z's legal name is Shawn Corey Carter.