Justin Timberlake, Jessica Biel and a pregnant Hilary Duff step out to support brain cancer awareness and medical research; Jon Hamm, Jenna Fischer, Nicole Richie and Eli Roth go to Spare Room to party for Mindy Kaling's new book; a very Twi-tastic premiere after party for Breaking Dawn takes a turn for the 90s with a mini Can't Hardly Wait reunion—L.A. was buzzing with events here and there on Monday, get the details in this edition of Last Night's Parties. More»

• According to witnesses, Mark Zuckerberg and Sean Parker got into a heated screaming match outside The Beverly over the Facebook-Spotify partnership recently (probably the same weekend they were spotted at Paul & Andre?), but Parker made sure to leave a $5,000 tip before leaving the club. Nerd drama! [Post]
• Due to her failure to appear at 9 scheduled visits at the Downtown Women's Center for court-ordered community service, Lindsay Lohan has been kicked out of the program. [KTLA]

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So Hilary Duff’s pregnancy announcement blew my mind when I thought about how she’s at such a completely different point in her life than me, even though I’m her contemporary. That really got the wheels in motion, because what the hell happened to Lindsay Lohan? I mean, they were both products of the same Disney machine, but with clearly varying results. So, because I have this odd case of ADD mixed with OCD here is a comparison of the two.

[Photo via]

Before I begin, I need you to imagine Bruce Springstein's "Born In The USA" playing in the background as you read this, k? Indeed the royal newlyweds are scheduled to descend on California for three days in July for their first official trip to the country during their summer tour, and surely a pit-stop in L.A. is in order. Prince William and Princess Kate's time here is limited so they'll need to spend it wisely, which means they'll require the assistance of a local to show them the way. They already asked me if I'd be their tour guide, but I had to decline as I have plans to lounge by a pool somewhere that day. I feel kind of guilty about it and thought I should throw them a bone.  So, William and Kate, I've prepared this list of 10 must-visit places to hit while here if you want the ultimate L.A. experience, which I know you don't since you probably won't go to any of them. But still, here they are, just in case you feel like living dangerously for a minute. More»

• According to Dina Lohan, Lindsay won't be doing the full court-ordered 90 days of rehab [TMZ]
• Hilary Duff's fiancé, Mike Comrie, has his bachelor party at Trousdale [Post]
• In case you weren't aware, finding work as a young adult has never been harder [CNBC]
• Judge is doubtful Prop 8 sponsors can legally appeal his ruling to overturn ban on gay marriage [HP]
• Jennifer Aniston one-ups Bill O'Reilly on parenting issue [PE]