Tumblr is testing the waters of paid advertising (according to CEO David Karp. The site had been strictly opposed to advertising in the past, but it’s turning its dashboard Radar feature — which was previously a curated space to highlight popular content on the site — into an ad unit. For ads to feel seamless and, well, not icky to Tumblr’s savvy young users, brands will have to get creative) (Ad Age)

The creators of ‘Sh*t Girls Say’ have landed a book deal (to take their online exploits offline. Harlequin will publish the full-color book with images drawn from the videos. In other book news, the children’s book “Goblins,” published by Scholastic, is going 3D on the big screen thanks to Laika, the same production company that made Coraline. Scholastic also announced today that it has landed a new five-book series called The Iron Trial from celebrated authors Holly Black and Cassandra Clare. The series follows Callum Hunt who has been raised to never trust magicians…but gets involved in their world) (GalleyCat) (Kidscreen)

Hearst and Elle magazine are launching a social commerce application for Facebook (that allows fashionistas to follow the seasonal trends highlighted in the magazine. Along with being able to select the buttons “want,” “love,” and “own,” they can also click “buy!” While we love the idea of social shopping, it feels a bit weird to think of a friend’s newsfeed peppered with expensive haute couture items that they want or have. Millennials like luxury, but they don’t like to broadcast their consumerism to their whole social circle) (Mashable)

We have to give Lego props for its clever online marketing extensions (releasing a movie making app so that anyone can create those awesome stop-motion animation Lego videos and post them to YouTube. The app release comes just a few months after Lego announced a social network for builders to share their creations and marvel at what others have made. We’ve said before that all physical brands should have online components to reach Millennials, but success lies in the execution, and Lego is putting the pieces together in the right way) (FastCoCreate)

Joss Whedon’s ‘Cabin In The Woods’ plays perfectly to Millennials’ sense of (impending doom — the Apocalypse! — and an us vs. them mentality that has surfaced between younger and older generations. Speaking of shows being made for Millennials, we’ve been following all the hubbub surrounding HBO’s “Girls”, and the jury is still out on whether it nails the Millennial generation or misses the mark. What’s your take? Tell us in the comments…) (PhillyMag) (Vulture)

One of the biggest differences in how Millennials and Boomers approach work is their attitudes toward office romances (with most Millennials seeing no problem dating coworkers, while most Boomers wouldn’t consider it. What’s more, they aren’t shy about sharing the news of their office romance on social media) (Fox Business)

We couldn’t help but laugh at these suggested movie product placements (which make us think some movies really are better without brands. Of course some — like “Back To The Future” — make it fun to think about what branding was, and what it could become!) (PR Daily)