Beyoncé's daughter and other baby Blues

We're used to celebrities and their bizarre baby names, but Beyoncé and Jay-Z have been surprisingly restrained in the naming of their new daughter, Blue Ivy Carter. After all, there are already quite a few Blues around: Blue Angel : 22-year-old daughter of U2's The Edge Ella Bleu : 11-year-old daughter of John Travolta and Kelly Preston Bear Blu : seven-month-old son of Alicia Silverstone Elijah Blue : 35-year-old son of Cher and her ex-husband Gregg Allman