On Jan. 7, 2012, music moguls and celebrity spouses Beyonce and Jay-Z welcomed the birth of daughter Blue Ivy. Ever since Beyonce publicly revealed her "baby bump" at the 2011 MTV Video Music Awards, tabloids and blogs tracked her growing belly with rapt attention, making Beyonce one of the most-anticipated new moms of the 21st century. The following famous parents aren't all red carpet royalty, but each is a unique case study on how the limelight can impact raising kids. (Larry Busacca/Getty Images)