Is Nelly Rude?

Nelly FurtadoMind your ps 'n' qs, don't talk with your mouth full, and no elbows on the table.

These are the kinda things we learnt as we were growing up.

But according to one man, not all celebs know this.

Restaurateur Guy Rubino has named and shamed those he believes to be the worst guests at his New York eatery, Rain.

He started with Nelly Furtado, and told The New York Daily News: "(Nelly) made a reservation for 10 guests. She showed up an hour late with five extra people in tow.

"For parties that size, we do a prix-fixe type of menu. Nelly objected and was really rude about it. She expected individual dishes to be prepared.

Justin Timberlake"Her manager even came into the kitchen and had the gall to say, 'Just f****** do it.'

"I told her that she and her client could 'just f****** leave.'"

And she isn't alone in her bad behaviour - Justin Timberlake also gets a bashing.

Guy added: "Timberlake comes into Rain, doesn't even look at the menu and shouts for random food that we don't make.

"If he knew what he wanted, why come to an Asian restaurant in the first place?

But there are some celebs who get an A+ in the manners department.

According to Guy, Michael Douglas and Catherine Zeta-Jones are the best diners: "They're very polite. Every time they come in, they pop into the kitchen to say hello. I just love them."