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Emma Roberts asks only her 6-year-old sister for advice

When Emma Roberts needs advice, she addresses her 6-year-old sister.

"I'm embarrassed to say I do ask her sometimes when I'm putting on clothes. I'll say, 'Is this cute, Grace?"' the 16-year-old star of television's "Unfabulous" said during a recent phone interview.

When it comes time to tune in the show, the daughter of actor Eric Roberts also knows she has perhaps the sharpest-eyed, and sharpest-tongued, critic in her younger sibling.

"She'll be like, 'I don't think I was really a fan of that shirt you were wearing. I'll say, 'Thank you for that, Grace,"' Roberts says, giggling. "If I want an honest opinion I'll definitely ask her."

In films, Roberts has portrayed everything from an iconic teen sleuth in "Nancy Drew" to a mermaid's best friend in "Aquamarine." But she says her "Unfabulous" character, the cute but klutzy Addie Singer, may be closest to the real her.

In a TV movie version of the show airing on the Nickelodeon cable channel, Addie finally gets to shed her less-than-hip persona when she manages to book an ocean cruise for her school's end-of-the year field trip. Unfortunately, the boat heads straight into a storm.

In real life, Roberts is home-schooled, but is planning to return to "real school" for her senior year. Then it could be on to college between making movies.

"I want to study photography and maybe journalism because I've gotten into writing lately," she says.

As for her sister: "She really wants to be a singer. But she changes her mind a lot. Like the other day she said she wants to be a cowgirl now."