Whether you're a prankster, or an unwilling recipient, there's simply no ignoring April Fool's Day, not even in the Twitterverse. Olivia Wilde warned followers, "remember people, today is a dangerous day. TRUST NO ONE." Nicole Richie had some tricks up her sleeve for pal Pete Wentz posting, "I had a PERFECT prank for @petewentz, but he caught me! Grrrrrrrrrrr. Gonna have to step up my game." But, we have to give credit to Joel McHale for pulling off today's best prank, as "The Soup" host hijacked Ryan Seacrest's twitter. The funnyman wrote "I'm Joel McHale. I've taken over Ryan's Twitter and his treehouse. Anyone know how to bake cookies?" He even changed Ryan's entire homepage to include only pictures of himself!
Celebs weren't just messing with one another, as many tweeted jokes to their fans. "New Moon" star Tinsel Korey convinced some she had a new gig, writing, "I just found out I got green-lit for my own show called "Cooking with the Wolfgirl" YAY!!!" while singer Ciara pulled the mother of all April Fool's jokes, tweeting, "3months pregnant:(...whats a girl to do??....this is going to be hard:( no more spanx:(....." Elsewhere, Joe Jonas tried to pull our leg by posting, "I just broke my leg.." Nice try, Joe!
Check out the rest of today's best celebrity tweets (no fooling!), including Jimmy Fallon's unlikely book club friends and Mark Salling's unflattering discovery. Follow us @hollywoodcrush to get even more celebrity and pop culture news around the clock!
@mark_salling It's officially mark salling ugly picture week
-Mark Salling, Actor ("Glee")
IAN SOMERHALDER 1: @iansomerhalderYes to tonight is a new epsisode! Watch TVD tonight 8PM! We're back for a while so grab friend, find your ass a seat and try to enjoy.
IAN SOMERHALDER 2: @iansomerhalder wow, I sound like cheap salesman...
- Ian Somerhalder, Actor ("The Vampire Diaries")
@jennyfrommtv My beefcake audition. Hard day today.
-Jenny McCarthy, Author, Actress ("Scream 3")
@iamdiddy Today is my son Christians birthday!!!!! Lil puff!!! Mimi me!
-Sean "Diddy" Combs, Rapper, Actor ("Get Him To The Greek")
@adammshankman Thank you america for making the last song the #1 movie yesterday!
-Adam Shankman, Choreographer, Producer ("The Last Song")
@aplusk My goal today is to make a new friend.
-Ashton Kutcher, Actor ("What Happens in Vegas," "That 70's Show")
@aplusk I love Jennifer Hudson..never met her but absolutely love her...
-La La Vazquez, TV Personality ("TRL," "Direct Effect")
@jimmyfallon I am on the Martiage Ref tonight with @kirstiealley & @sherylcrow1. Start of a friendship - maybe a book club.
-Jimmy Fallon, TV Host ("Late Night with Jimmy Fallon")
@officialmballas I just made history, I got @DohertyShannen to get me MCDonalds lol awesome http://moby.to/n1t01n
-Mark Ballas, Dancer, Reality Star ("Dancing with the Stars")
@jodellemicah I went to a poster store and asked if they had a Jason Mraz poster, the guy said, "Which band is he in?" Clearly, I went to the wrong place.
-Jodelle Ferland, Actress ("Eclipse")
@chelsealately TIME Magazine thinks I might be influential. Not sure if they mean good or bad influence...
-Chelsea Handler, Author, TV Host ("Chelsea Lately")

** Hollywood Crush Twitter