There's no way this actually happened.
Not only does Star Magazine have a penchant for absolutely bogus covers (see Britney and Kevin 2004 file photo turned 2008 romantic getaway), but if the event described below really took place, every publication in Hollywood would know it.
Moreover, the tabloid's claim that Nicole Richie packed her bags after a bitter fight with Joel Madden and left him with their daughter in tow is undercut within the article ... by the supposed "fact" that she returned a day after the supposed fight.
So, if you went to investigate the accuracy of this story, you'd learn she's - lo and behold - still living there, making it hard to disprove. How convenient, Star.
This magazine cover is therefore only notable for a cute picture of Harlow Madden. Which is nice at least. Aww. Now that's one cute celebrity baby ...
The article also claims that Joel was indeed "caught" with Mischa Barton (who just broke up with Taylor Locke) ... at the same party. For shame, Joel.