Pink's daughter Willow Sage may only be two years old, but she's already on the Hollywood A-list. Guests at her birthday party on Sunday in Malibu, California included the sons of Sandra Bullock and Selma Blair .
According to the British paper The Daily Mirror , Sandra brought her son Louis to the bash, while Selma brought her son Arthur. As the women walked up the driveway, they were greeted by a smiling Cookie Monster costumed character.
Pink tweeted on Sunday, "Happy Birthday Angel Baby Willow Sage. Mama sure is grateful you chose us. XOXO." Pink and husband Carey Hart welcomed Willow on June 2, 2011.
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