"I want to have, like, 15 babies. I've always wanted to be pregnant," McPhee explained in an interview published in Stuff magazine's August 2007 issue. "One year for Halloween, I decided to be pregnant, so I got this nun costume, and I put a big belly under it. I showed my parents and said I want to go to school as a pregnant nun. My dad sat me down and said, 'Katharine, you can't!'"
If Mr. McPhee wasn't a big fan of his daughter's Halloween costume as a teenager, he was probably even less enthusiastic about the cover for her self-titled debut album, which depicts the Idol 5 runner-up seated spread eagle pulling a long sweater down over her private area, running her hand through her hair and wearing knee-high boots.
"People made a big deal out of [my album cover being racy]," McPhee told Stuff. "They said, 'She's a slut, blah blah blah.' But I'm really not showing that much skin. It's all suggested."
McPhee said the album cover and Stuff photo shoot -- including the issue's cover image of her wearing nothing but a bra and pantyhose -- don't represent a new side of her and instead are just a "different" side that she didn't show during her time on Idol.
McPhee first started to notice her other, more sexier side when she was in high school.
"I was prematurely developed. As a freshman [in high school], I looked like a junior; I had boobs," she told Stuff. "Some of the older kids saw me in the yearbook and said I was cute."
While she attended the all-girl Notre Dame High School and was "determined" to land a boyfriend once her education there was complete, McPhee didn't exactly find somebody her own age. Instead, she began dating her current boyfriend of more than two years, 41-year-old actor Nick Cokas.
"When I turned 21, I thought it was a good age to explore," she told Stuff. "You're no longer a teenager, so it's okay [to date older guys]. I gravitated toward them, and I love them. They're just wiser, and they're less about themselves and more about you."