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Victoria Beckham gushes about baby daughter Harper on Twitter

Victoria Beckham in Hollywood, Calif., on May 23, 2011. Getty

(CBS) For new mom Victoria Beckham, the arrival of her first daughter, Harper Seven, with husband David Beckham, has been pure bliss.

The former Posh Spice shared her joy about her family's new addition via Twitter on Thursday.

Pictures: Celebrity babies
Pictures: Posh and Becks
Pictures: Victoria Beckham

"Baby Harper is the most beautiful baby girl I have ever seen, I have fallen in love all over again!!!" she wrote.

The 37-year-old, who gave birth on July 11 in Los Angeles, also noted that baby Harper's three older brothers - Brooklyn, 12, Romeo, 8, and Cruz, 6 - equally share her excitement.

"We all feel so blessed and the boys love their baby sister so much!" she added.