Amy Robach was one of the many stars who took to social media on Sunday to celebrate Mother's Day in the US.The Good Morning America star shared a gorgeous beach selfie with her lookalike mother Joanie, which showed the pair clutching onto wine glasses as they posed by the ocean.MORE: GMA's Amy Robach's mother shares heartbreaking postIn the picture, Amy looked glamorous wearing a printed dress, with her hair styled in a chic updo.Joanie looked just as stylish in a contrasting floral dress, with