Naomi Campbell is throwing a lavish Indian 50th birthday party in Jaipur, Rajasthan, for her billionaire boyfriend Vladimir Doronin early next month, Page Six has exclusively learned. The four-day celebration, to be held at various locations including a historic palace, will start on Nov. 4, and Campbell has invited friends from around the world, including many from London, Moscow and New York. A source tells us, “Naomi is flying a lot of people out to India and paying for everything.” The supermodel has sent out e-mail invitations bearing a picture of Vlad underwater James Bond-style with a Seabob, a hand-held propulsion device. His birthday is on Nov. 7. Campbell is believed to have booked a luxury five-star resort for the celebrations and is being helped to organize the festivities by Paris-based travel expert Omar Cherif, who owns OC Travel. Another source told us, “No expense has been spared. Naomi’s team is even helping their friends secure visas. It will be the party of the century.” Naomi and Vlad have been dating since 2008, and in 2010 he threw her a lavish 40th birthday party on the French Riviera, flying in the Black Eyed Peas and Grace Jones. The guest list featured Donatella Versace, Kate Moss, Giorgio Armani, Jennifer Lopez and Doronin’s fellow Russian oligarch Roman Abramovich.