The couple's relationship lasted nine long months

The love of Paris Hilton's life didn't last very long.

The celebrity party gal and Good Charlotte rocker Benji Madden have split up, and Prince William might be the cause, report celebrity news sources.

The couple was together for nine months, just long enough to bring a baby to full term -- something they didn't do, unlike Madden's twin brother Joel Madden, who has a baby with Hilton's former BFF Nicole Richie.

Rumors are flying and fingers are pointing regarding who broke up with whom and why. One account claims that Madden, 29, isn't pleased with the attention that Prince William, 26, has been paying Hilton, 27, ever since they started hanging out on the set of "Paris Hilton's My New BFF" show in London. Although security concerns prevent confirmation, it's rumored that the Royal will attend a New Year's Eve bash with Hilton in Australia to launch a social networking site.

Another account claims that Hilton has been seeking attention elsewhere and was even photographed getting cosy with her ex Stavros Niarchos in Miami. Many have blamed Madden's controlling ways, supposedly the reason why his engagement to "Date Movie" actress Sophie Monk was broken before he began dating Hilton.

Or, perhaps nine months far exceeded the shelf life for a relationship between two such unlikely parties.

Hilton currently appears on the big screen in the limited fantasy/horror/musical release "Repo! The Genetic Opera."