World Series Excitement, Oscar Host(s) Love & Diddy's 40th Tops Tweet Dreams

With the World Series heading back to NYC tonight (the New York Yankees could take it all in the pivotal game 6) celebs are coming out in full force to join in the fun (and not just Kate Hudson!) Taking a cue from the "Glee" cast, Mary J. Blige will have the duty of singing the National Anthem, tweeting to fans this afternoon, "I just arrived at Yankee Stadium for rehersal of National Anthem!" While she's there, she may run into her old "Entourage" costar (she guested on the show back in 2007) Jeremy Piven who posted, "Heading to NYC for a little hardball game, should be a good one. Fun to watch the best in the world." And while she may not be heading to the Bronx for the game, "One Tree Hill" star Allison Munn wrote simply, "So happy to be spending the next few days in New York. I miss living here." Hmm, do we sense an Allison Munn/ Jay-Z collabo in the works?

But, the World Series isn't the only thing that has Hollywood excited. The announcement of the Oscar cohosts came yesterday and while it was not Robert Downey Jr. and Ben Stiller who turned down the opportunity, the choices still delighted fans. Just ask "Ugly Betty" actor Michael Urie (pictured) who excitedly tweeted, "Steve Martin and Alec Baldwin hosting the oscars? Love it!" We do, too! But what do you think? Will the pair make for a fun Academy Awards ceremony or will you be missing Hugh Jackman?

Get the rest of today's best celebrity tweets below, from John Mayer and Nina Dobrev's enviable schedules to party master P. Diddy's 40th (!) birthday. Make sure you follow us @hollywoodcrush to get all the latest news about your favorite stars in the Twitterverse and beyond!

@tomfelton thermals on...another freezing day outside.....need another set of thermals but trying to be manly instead x

-Tom Felton, Actor ("Harry Potter and the Half-Blood Prince")

@johncmayer Sweatpants, bed, laptop, movies, sleep, heat, water, time, quiet. 12 hours before reset. Loving every second.

-John Mayer, Musician

@real_ninadobrev day off tomorrow. :| what will I do with myself? Oh right...catch up on SLEEP!

-Nina Dobrev, Actress ("The Vampire Diaries," "Degrassi")

@julieplecSaw my first "New Moon" billboard. Pretty psyched to see that movie, gotta say

-Julie Plec, Co-Executive Producer ("The Vampire Diaries")

@iansomerholder1 Hungry? If anyone is in HAILEY (Sun Valley) Idaho tonight my family owns and operates the most amazing gourmet pizza spot called McClain's

-Ian Somerholer, Actor ("The Vampire Diaries," "Lost")

@kendrawilkinson just asked hank to hide or throw out chocolate cuz been eating too much but then i get mad at him for doing it lololol -Kendra Wilkinson, Reality Star ("Kendra")

@realtracymorgan Just got off the phone with puff daddy wishing him a happy birthday

-Tracy Morgan, Comedian, Actor ("30 Rock")

@iamdiddyThank you to everyone who is withing me a HAPPY BIRTHDAY! Thank you!

-Sean "P. Diddy" Combs, Rapper, Reality Star ("I Want to Work for Diddy")

@nickyhilton My kitties new favorite toy--->playing tetherball with my beautiful chandelier :(

-Nicky Hilton, Heiress, Designer

@michaelianblack Is it possible to use the word "half–pipe" in a sentence without also using the word "dude?"

-Michael Ian Black, Comedian, Actor ("Michael and Michael Have Issues")

@nikkiblonsky1 i just found out that RT stands for Re Tweet wow my freind jess is saving my life on twitter

-Nikki Blonsky, Actress ("Hairspray," "Valemont")