Kardashian's unusual wedding gift

Kim Kardashian. Picture: Evan Agostini/Invision/AP

Ray J has given Kim Kardashian his share of the 2014 profits from their sex tape as a wedding gift.

The singer has offered his former girlfriend and her fiance Kanye West a cheque for almost US$47,000 ($50,523), which is the amount of money he made from the X-rated Kim Kardashian Superstar video that was filmed when they were dating in 2007, between January and April this year.

According to gossip website TMZ, J picked up $6135.60 in January, a staggering $20,097.31 in February, $9,674.76 in March, and $10,931.52 in April, and under the deal signed with Vivid Entertainment - who say the tape has made an estimated $50 million to date - she is entitles to royalties at least the same as her former lover.

It is unclear as yet whether Kardashian will accept the gift, but if she doesn't, her former flame has pledged to donate it to her favourite charity.

It was previously claimed that West had always refused to watch the raunchy film.

A source previously said: "For all his bad-boy image, he's quite old-fashioned and [while they were still just friends] he thought it inappropriate to view Kim's tape. Now that they are a couple, there's no way Kanye's ever going to look at it."

West is so sensitive about the sex tape he won't even let anyone in his entourage or circle of friends talk about it.

"When some of his buddies were teasing him about it over a few beers just recently, he went crazy and told them in no uncertain terms that the subject was completely off limits," the insider added.

"At first they thought he was joking, but he was deadly serious. Kanye never, ever wants to see the tape, and he has banned anyone in his entourage from even talking about it."