The Dancing on Ice presenter and Chelsea footballer are said to have offered other couples money to buy their booked wedding dates.
"I'd never in a million years ask someone to move a wedding," she told The Sun.
"Stuff like that makes you out to be a horrible person."
The pair are alleged to have given another couple £100,000 to change their wedding day at Galgorm Manor hotel in County Antrim, near Bleakley's home.
Lampard is also alleged to have offered to pay off another couple's mortgage if they cancelled their wedding at Dromoland Castle Hotel, County Clare.
Bleakley added: "One hotel even put out a story that I'd paid for an Italian restaurant to be opened in their venue because I wanted that food. I'd never get married there!"
A source explained: "All these tales are just an urban myth. The same rumours circulated when David and Victoria Beckham announced they were to wed."
Bleakley explained that there are still no set plans for her and Lampard's wedding date.
"I honestly don't care whether the napkins match the colour of the bridesmaids' dresses. I just want a low-key, relaxed day surrounded by the people I love," she added.
Bleakley recently said that she and Lampard will not sell their wedding rights to a magazine.
The couple became engaged in June last year.