The 'Ordinary People' singer is set to tie the knot with the Sports illustrated model this month, and he insists he feels fine about the bid day and is more worried about the reaction to his new album 'Love in the Future' which is out this week.
Speaking to the New York Post newspaper at the Box nightclub in New York City, John said: ''People keep asking me if I am nervous about getting married, but I am a little more nervous about my album coming out. But yeah, I guess you're supposed to get nervous before you get married, but I feel good.''
The 34-year-old musician was performing tracks from his latest LP at the venue for a Scene magazine party, and he revealed one track which recalls a sexual encounter between him and Chrissy left her embarrassed when he played it to her parents.
He explained: ''She got a little embarrassed. The second line is 'We couldn't wait, we did it in the living room.' ''
John and Chrissy, 27, are marrying near Lake Como in Italy early in September.
The model - who got engaged to John in 2011 after four years of dating - will wear a custom-made Vera Wang wedding dress on the big day and the couple hired a wedding planner to get every detail right.
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Pratchett died aged 66 in March 2015.