Courtney Love celebrated her estranged daughter's eighteenth birthday a day late on Twitter: "youve done a dammed good job frances of destroying anything i could build." She's a "sell out," and Courtney knows how to "ruiinher." Happy birthday! [Buzzfeed, @CourtneyLoveUK]

What do you get the social-networking mogul who has everything? Click to see Valleywag's gift to the 25-year-old blunderkind CEO of Facebook!

James Hong, who recently sold rating-and-dating site HotOrNot, has announced his engagement to girlfriend Julia Zhang. I wondered if he'd dropped down on one knee at Max Levchin's wedding over the weekend, where he served as best man, but Hong tells me he popped the question a few weeks ago. Hong also celebrated his 35th birthday earlier this week. I guess this settles the question, James: Definitely hot.

According to a tipster, Marissa Mayer, (not) everyone's favorite Google VP for products, San Francisco society diva and baking wantrepreneur, turns 33 today. Valleywag never forgets its friends, so guess we got you a present, Ms. Mayer! Check it out, below.

We hope hard-working PC World editor-in-chief Harry McCracken is taking a break for his birthday. McCracken looked stressed in this pic that Valleywag very special correspondent Paul Boutin snapped at Macworld in January. He may be too busy saving DOS to celebrate, however.

Born on March 26, 1973, Google cofounder Larry Page turns 35 today. Maybe wife Lucy will get Larry some jewelry to match Sergey's. (Photo by dannysullivan)

Happy birthday, Justine Ezarik! The lifecasting blonde also known as iJustine turns 24 today. Head over to Facebook and give her a birthday poke, but good luck getting a friend request in. Like Robert Scoble, Justine has bumped up against Facebook's 5,000-friend limit. Want to send her a present? We suggest a Starbucks gift card. Not only will it get her free wireless after AT&T moves in, but you'll be hooking Justine up with her favorite drink: a triple grande nonfat no-whip 6-pump extra-hot white mocha.

The New York Times tech columnist-cum-singing sensation turns 45 today.
(Photo by realmerlyn)

Digg founder Kevin Rose turns 31 today. Google might think you're only 30, but we can do the math. Happy 31st, Kevin! We hope you find this post even more heartfelt than the 13 birthday wishes you got on Facebook — oh, and Julia Allison says happy birthday, too. Now Kevin, I have a rich uncle who's looking to invest some money. Can you fill me in on Digg's secrets? (Photo by AP/San Diego Zoo)