The former Destiny's Child stars have been to see their ex-bandmate and her first baby, who was born on January 7, and say both her and husband Jay-Z have quickly taken to their new parental roles.
Speaking of Blue, Michelle said: "She is absolutely gorgeous. We were all in love. Beyonce and Jay-Z have already settled into their role of being parents, and it's just awesome to see."
Michelle admitted seeing Blue had even made her a little broody herself, adding: "They might have inspired me a little bit, but this ring finger got to get a little more heavy first!"
Kelly has also fallen for the tot but was reluctant to disclose which of her parents the newborn looks like.
Speaking at the BET Honors awards in Washington she told USA Today newspaper: "That will be something that everybody will have to experience the same way I did. That's for her parents to disclose, not myself."
Kelly has previously been seen buying a bright green babygro with a picture of Bob Marley's face on it for Blue, and has said she can't wait to babysit her.
She said: "I will babysit and change a diaper or two, and then give it back. I do want kids, but every time I think about a little person growing inside of me and getting bigger and bigger and then having to come out - a watermelon coming out of something the size of a lemon is insane to me."
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