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The Mean Girls actress, who is expecting her first child with husband Bader Shammas posted a photo on her Instagram Stories on Sunday showing her sitting at an outdoors table beside her sister Aliana and mother Dina. Lindsay wore a sleeveless orange outfit and sat near a gift and a yellow frosted cake. Decorations featuring the words "Oh baby" and "Hello world" appeared on the table. Celebrity stylist and fashion blogger Juliet Angus also attended the celebration. Alongside a selfie with the actress, she wrote on Instagram: