Stars Ponder The New Zodiac While Miranda Cosgrove Teams Up With Rivers Cuomo In Today's Tweet Dreams

"What's your sign?" What used to be a simple pick-up line is something of a loaded question after yesterday's news/debacle that the Zodiac signs have changed. Celebs pondered their new fates, including Steve Martin who joked, "According to the new Zodiac sign dates, I am now a Kitten" and Haylie Duff who noted, "I'm now an aquarius? I was quite comfortable in my Pisces water. Guess it's time to take a deep breath of my new air." Plenty of famous tweeters had opinions on the "new" sign Ophiuchus, including Dave Coulier who cracked, "Ophiuchus sounds like a cuss word that an alien would use in a funny sci-fi film. "The intruders have breached the air lock! Ophiuchus!"

The stars may not have aligned in 2011 for our Zodiac signs, but they sure did in Hollywood today. Miranda Cosgrove teamed up with Weezer front man Rivers Cuomo (both pictured), as she alerted fans, "Put the finishing touches on a new song today with @riverscuomo! What a great guy :)." But theirs wasn't the only awesome collaboration today, as Katy Perry stopped by "How I Met Your Mother" for her upcoming appearance. A starstruck Alyson Hannigan posted from her page, "Katy Perry is on set!!!"

Check out the rest of Friday's best from the celebrity Twitterverse, including Kanye West's most epic tweet to date! Follow us @hollywoodcrush to get even more celebrity and pop culture news around the clock!

@kanyewest Yo Britney, I'm really happy for you and I'mma let you be #1, but me and Jay-Z single is one of the best songs of all time! LOL

-Kanye West, Rapper

@simonpegg Green Hornet opens this weekend. Get out and see Rogen looking all slim and sexy and kicking butt.

-Simon Pegg, Actor ("The Chronicles of Narnia: The Voyage of the Dawn Treader," "Star Trek")

@ashleymgreene Very exciting news! I just became an honorary aunt! One of my closest friends gave birth to a beautiful baby boy last night!

-Ashley Greene, Actress ("Breaking Dawn," "Eclipse")

@goldiehawn Thank you all for your good wishes for our new baby! Family holds us tight!

-Goldie Hawn, Actress ("The First Wives Club")

@theellenshow Vince Vaughn just became a daddy and he’s already worried about preschools. This is why Portia and I have cats.

-Ellen DeGeneres, TV Host ("The Ellen DeGeneres Show")

@kelly_clarkson I don't know why people keep calling my new album "May" but that's the worst title ever and is NOT the title of my new album haha

-Kelly Clarkson, Singer

@msamberpriley I'm so honored to be apart of @seventeenmag's Body Peace Council! It feels amazing to b awarded for just LOVING MYSELF!

-Amber Riley, Actress ("Glee")

@tyrabanks I type with two fingers soooo fast! I'm writing MODELLAND book with two fingers as fast as pro typists! Heck yeah!!! Can u type?

-Tyra Banks, Model, TV Host ("Tyra," "America's Next Top Model")

@sn00ki I feel like shoppinggggggggggg (oprah yell)

-Snooki, Reality Star ("Jersey Shore")

@justinbieber dealing with a lot of #Situations... You will soon find out. #neversaynever3D

-Justin Bieber, Singer