Rumors linking Harris, who was December 2009's Playboy Playmate, to McGraw first surfaced when they were spotted together at a popular Los Angeles hotspot, People reported Wednesday.
Blakey added their relationship was strictly professional in that McGraw was only helping 25-year-old Harris break into the music industry -- which was one of the main reasons the Playmate called off her wedding and broke up with Hefner, her former fiance, according to TMZ.
"They wrote a song together and that was the extent of their relationship," Blakey said.
Harris not only reportedly felt that marrying the 85-year-old Hefner would hold her back in her music career, but she was also frustrated over her tightly budgeted finances -- a mere "couple hundred dollar" weekly allowance from Hefner.
According to sources directly involved in planning the wedding of the former couple -- who got engaged over the holidays last December -- Harris felt she "couldn't be married to Hef and have a successful music career," TMZ reported.
Harris' new song that she recorded reportedly hit iTunes this past Monday.
While Harris is seemingly happy that she is launching her music career as a single woman, former The Girls Next Doorstars Kendra Wilkinson and Holly Madison still have a soft spot in their hearts for Hefner and have been reaching out to him with support.
"We are coming over with some Jack and coke," Wilkinson, who now stars in her own Kendra reality series, jokingly wrote on her Twitter account on Tuesday. "Oh, and a pipe lol."
"Wish I was there to support, too!" tweeted Madison, who previously dated Hefner but ended their relationship in late 2008 because he expressed hesitation to wed again after his first two marriages ended in divorce.
Similar to Wilkinson, Madison also currently stars in Holly's World, her own spinoff reality series which aires on E!.
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