It looks like Pippa Middleton's famous bum is still the topic of discussion with experts now accusing the Vanity Fair columnist of having a fake butt.

According to E! News, Kate Middleton's little sister is being accused of enhancing her derrière in the Alexander McQueen gown that she wore to the royal wedding.

Even though the extravagant ceremony took place three years ago critics still can't seem to get over Nico Jackson's girlfriend's figure hugging dress that flaunted all of her curves.

Stephane Bern, who is Knight of the Order of Grimaldo in Monaco and an etiquette expert, recently alleged that the fashionable socialite wore padding under her dress.

The 50-year-old said, "Of course she had a false bottom," adding, "I repeat it: Sshe had a false bottom. You take her away from that and she has normal buttocks."

Bern went on to say, "It was an optical illusion; she knew there were a billion people watching. It was the moment to show it."

In the past Pippa Middleton took it upon herself to address all of the speculation that she has been receiving since the wedding while at the Women in Advertising and Communications dinner back in February.

In front of 400 attendees the 30-year-old joked, "As I have found out, recognition has its upside, its downside and-you may say-its backside."

Although she admitted that she was happy that the beautiful white gown fit at the time of the royal wedding, "in retrospect, it [fit] a little too well."

Do you think it is time to move on from Pippa Middleton's tight fitting royal wedding dress? Let us know your thoughts in the comment section below.