Jessica Alba's Baby News And Kourtney Kardashian's Engagement Rumors In Today's Tweet Dreams

News spread like wildfire this morning that Kourtney Kardashian was engaged to her boyfriend Scott Disick. Turns out, that's exactly what it was for Kourtney: news! The reality star addressed the rumors that she would wed her longtime (and, let's be honest, not always beloved) baby daddy, when she wrote from her Twitter page, "WOW!! Where do the mags come up with this stuff? And claiming exclusives? Come on now." While her little sister Khloe Kardashian (pictured here with Kourtney) wouldn't address the story, she did share, "Just saw @KourtneyKardash new house! It looks fab already! Can't wait until everything is unpacked! Mason I can't get enough of you!"

But Kourtney, Scott and baby Mason weren't the only fam with changes ahead. Jessica Alba announced that she and her hubby Cash Warren are expanding their brood, as she linked to her Facebook page from Twitter to tell fans, "It's been a while since I've been on FB & I thought I'd drop by to let you all in on some exciting news>Honor is going to be a Big Sister!" The actress got plenty of well wishes from the Twitterverse, including some from pals like rocker Joel Madden who wrote, "Congrats you two @cash_warren @jessicaalba some of the best parents around. Happy for you guys!! Another superhuman on its way!!!" and his brother-bandmate Benji Madden, "@cash_warren @jessicaalba Congrats you two! You sure do make beautiful babies! Uncle Benj is stoked!"

Check out the rest of Wednesday's best celebrity tweets, including Britney Spears giving a sneak peek of "Hold It Against Me" and Nick Jonas appearing on "Mr. Sunshine"! Follow us @hollywoodcrush to get even more celebrity and pop culture news around the clock!

@britneyspears Here's a little something to hold you over.... http://bit.ly/extisW -Britney

-Britney Spears, Singer

@nickjonas Hey everybody! Watch me tonight on Matthew Perry's new ABC show MR. SUNSHINE. 9:30 pm et/pt, 8:30 pm ct. Spread the word!

-Nick Jonas, Musician, Actor ("JONAS L.A.")

@joshgroban Just finished an incredible meeting with my new Straight To You Tour design team. This will be unlike anything I've ever done.

-Josh Groban, Singer

@druiddude Janelle Monae, Bruno Mars, & Plan B all on tour. My mind exploded.

-Kevin McHale, Actor ("Glee")

@howie_d On my way to South America now with BSB. Can't wait for the tour to kick off, its gonna be great!!!

-Howie Dorough, Singer (Backstreet Boys)

@kimkardashian My first day in the recording studio http://bit.ly/gmYMPT Such a fun experience!!!

-Kim Kardashian, Reality Star ("Keeping Up With the Kardashians")

@mirandabuzz The band is always trying to steal my iCarly 2 videogame #handsoff http://yfrog.com/gzws24j

-Miranda Cosgrove, Singer, Actress ("iCarly," "Despicable Me")

@nickcannon Just got off the phone with @ChelseaHandler The beef is over! I think... She will be on my show tomorrow morning @923nowfm

-Nick Cannon, Radio and TV Personality ("America's Got Talent")

@hayliek I imagine living in "the bad girls club" house would be similar to surviving in prison.

-Haylie Duff, Actress ("Material Girls")