Bindi Irwin!The conservationist couldn't have been happier to celebrate her first birthday «as a mama.» Bindi turned 23 on Saturday and posted an adorable photo of herself and four-month-old daughter Grace, as well as a family snap with husband Chandler Powell, brother Robert Irwin and mom Terri Irwin.«My first birthday as a mama has been the most beautiful gift. Our sweet Grace Warrior’s face says it all,» the star wrote.