Nicole Richie's baby has 4 or 5 possible fathers?

We all have assumed that Joel Madden is the father of Nicole Richie's unborn child. How silly we are. (How silly I am for reporting on something the National Enquirer says). But what the heck, here goes:
A report is set to reveal that Joel Madden may not be the father of Nicole Richie’s unborn child. The National Enquirer will claim that there were four men in Nicole's life before she found out that she was pregnant.
Their report says that Nicole will not know for sure who fathered her child until the potential baby-daddies undergo paternity tests.
A source tells the Enquirer: "Nicole recently underwent a series of tests, including blood and urine screenings, which confirmed she is pregnant."