Credit: Jared Leto writes book about Haiti travels and more!

1.) Happy Anniversary, No Doubt! The band's been together for 25 years! While feelings of oldness are crushing us, Gwen Stefani hasn't seemed to age a bit. (ALT Sounds)

2.) We already know Justin Bieber's the perfect "Boyfriend," but in a recent interview, Biebs dishes on what really makes him the best guy to date. HINT: It's not just his good looks. (People)

3.) Kelly Clarkson's"Dark Side" gets an official remix, and we can't stop listening (and dancing) to it on repeat. (Pop On And On)

4.) Rumor has it that Rihanna and Chris Brown could share the same stage (?!?) at the Supafest music festival in Australia this April. We wonder what Rihanna's rumored boyfriend Ashton Kutcher thinks of this possibility. BTW: We love rumors. (Vibe)

Check out the rest of this week's 10 Things To Know Now after the jump!

5.) A recent trip to Haiti inspired Jared Leto to create a book based on the experience. All profits from the book's sales will go to the Haitian Earthquake relief. This also just in: Jared's big heart is as gorgeous as his hair. (Huffington Post)

6.) Ke$ha and Bon Iver are just a few collaborators on The Flaming Lips's upcoming album, The Flaming Lips and Heady Fwends. (MTV Hive)

7.) If you're a fan of "Downtown Abbey" and fast food, then this "Downtown Arby's" spoof was ordered just for you. Enjoy it with a side of curly fries and Horsey sauce. (I'm thinkin' Downton.) (Yahoo Screen)

8.) Katy Perry asks fans to pick music for her upcoming 3D concert movie, "Katy Perry: Part Of Me" via Twitter. Have we mentioned that we love how technology makes us feel like we're BFFs with celebs? (Pop Crush)

9.) The Smashing Pumpkins haven't released a new album since 2007, but come June 18, the band's newest record, Oceania, will have you dusting off your Zero t-shirt. (Pitchfork)

10.) We've heard about people looking like their dogs, but how people who look like abandoned mattresses? People like... Miley Cyrus? The internet is a magical place. (BuzzFeed)

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