Kelly Rowland has gushed about Beyonce and Jay-Z's newborn daughter Blue Ivy, describing her "beautiful."

The X Factor judge and her former Destiny's Child bandmate Michelle Williams visited the new arrival at her home in New York, and says she was in awe of her new 'niece.'

"She's absolutely beautiful! And I say that with such a huge grin! I'm so excited," Kelly told E! News. 

"We all just stared at her. I just stared at her. She is so beautiful," she added.

A source revealed earlier this week that she, Kelly and Bey held a singson for Blue, taking them back to their DC days.

It was reported yesterday that Bey was seen outside the CNN studios in Alabama to prepare for an interview where she will debut Blue to the world.

Kelly Rowland, T.I., Gabrielle Union and more attend Dwyane Wade's 30th birthday party...