According to The Mirror, singer Lana will be flown out to Europe to serenade the newlyweds and their guests at the lavish ceremony on Saturday, 24 May.
A source told the newspaper that Kanye arranged the performance as a special gift to Kim as he knows how much Kim likes Lana's music, particularly the track 'Young and Beautiful'.
"[Kanye] told Lana that it's his and Kim's special song and it would mean so much to have her perform it," said the insider. "She couldn't say no."
Keeping Up With The Kardashians star Kim and rapper Kanye reunited in Paris at the weekend ahead of their nuptials on Saturday.
It was originally believed they would marry in France but now it's been claimed guests will simply get together in Paris for a pre-wedding reception before being flown to Florence for the actual exchanging of vows.
A spokesperson for the Florence mayor's office confirmed that Kim and Kanye had booked the imposing 16th century Belvedere Fort for this weekend, while Kanye himself revealed in the past week how special Florence is to him and Kim. He even suggested their daughter North, born June 2013, was conceived there!
Ahead of the wedding ceremony, it's thought Kim and Kanye will treat their guests to a private tour of the Palace of Versailles in Paris.
So far, any other details about the wedding are being kept firmly under wraps, including which designer Kim will wear down the aisle, where they will honeymoon and who will be on the guest list - although it's probably a very safe bet that all members of the Kardashian-Jenner clan will be present!
Kim and Kanye became engaged in October 2013 when Kanye popped the question on Kim's 33rd birthday.
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Watch Lana's music video for 'Young and Beautiful' below: