The long list of celebrities likely to attend the main birthday function on Tuesday includes Black Eyed Peas, Grace Jones, Donatella Versace, Kate Moss, Giorgio Armani and Jennifer Lopez.

"Campbell reached Jodhpur Sunday. She took stock of the preparations and seemed satisfied with them. They were more interested about the two venues of the fort, Daulat Khana and the Zenana courtyard, where the main bash will be organised," an official said.

"Everything from dinner to decorations is based on Rajasthani culture. There will be sophisticated lighting outside the fort, however, the scene will be entirely different inside it," said an official of an event management company involved with the preparations.

Officials privy to the celebrations said that the Daulat Khana would be entirely lit up with royal oil lamps rather than electrical lights.

"It will be a beautiful experience for the guests who would be seated on special Rajasthani beds called 'macha'," an official said.

He added that 13 chartered planes flew several high-profile guests from Moscow, London, New York, Abu Dhabi, Istanbul, Mumbai and Delhi, to Jodhpur on Monday.

"More guests will arrive on Tuesday when the birthday will be celebrated," the official said.

The musical performance by Diana Ross will be one of the main attractions at the function.