What should I get for my mom?

As you all know, Mother's Day is coming up. The other day my mom told me what she wants, a pedi and mani gift card, a type of jewelry, and a diamond enlargement for her wedding ring and maybe an iPhone 4g. So I know what I am for sure getting her, Gift Card, and Earrings. Another thing also but I don't know what. So what I am asking is what should I get her as an additional thing? Along with the gift card and earrings. My other question is, if I do decide to get her one more thing, should I get her an iPhone or a ring enlargement? Please help me and soon.