The UK's very ownCheryl Cole also tweeted: "Congratulations to Beyonce and Jay on the birth of their first child.. Welcome to the world Blue Ivy!"
Take That frontman and The X Factor judge Gary Barlow also said: "Congrats to Beyoncé & Jay-Z on the birth of their first child Blue Ivy... Special moment! x"
R&B star Ne-Yotweeted: "Shout out to Blu Ivy Carter! Jay and B's beautiful baby girl! WELCOME TO THE WORLD PRINCESS!!"
Bey's sister Solange also commented on the birth of her niece, simply posting on her Twitter page: "The most beautiful girl in the world."
It is thought that their daughter's name has been inspired by Jigga's favourite colour Blue, with Ivy representing theDestiny's Childstar's favourite number 4 or IV - which was also the name of her last album.
Despite various celebrities reaching out to young Blue, Young Moneyrapper Nicki Minaj is tipped to be the baby's godmother.
Minaj seemed to comment on the reports yesterday after one of her fans asked Nicki about the birth of her goddaughter on Twitter, to which the 27-year old replied: "Jop! She's da queen! Zont b mod bew bewz!"