PHOTOS: 25 Most Unique Celebrity Baby Names
Knowles attended the Runway to Win Fundraising reception for President Barack Obama last night and gushed over Beyonce and Jay-Z's little bundle of joy. "She's beautiful."
When asked what it's like being the grandmother of two beautiful children, she happily replied, "It's the second best job I've ever had."
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Knowles says Blue is only a month old so we'll have to wait a "minute" to see which parent Blue most resembles.
Speaking of Blue, her name is so popular that Jay-Z and wife Beyonce, who made her first post-baby appearance on Tuesday, have reportedly filed a trademark application with the U.S. Patent and Trademark Office. This comes after Chicago designer Joseph Mbeh tried to trademark the name "Blue Ivy Carter NYC" without their permission.