Mariah Carey’s and Tommy Mottola’s royal-style ceremony is said to have been inspired by Princess Diana and Prince Charles’ wedding. And if you take a closer look, you’ll see that Carey’s voluminous wedding dress with a 27-foot train and replica tiara did resemble the one Lady Di wore for her big day. The couple reportedly spent around $500,000 at the time, which is close to $1 million today.