Break out the blue - Hilary Duff is having a boy! The star, who revealed her pregnancy on 'Ellen,' in October, showed off her burgeoning baby bump with a cute holiday Twitpic. Duff and her husband of one year, NHL player Mike Comrie, are thrilled to welcome their first child.  Is it getting hot in here? 'Tough Love' star and British model Leilani Dowding goes for a sexy dip in Miami wearing little more than a Santa hat.  Yup, Christmas is officially ruined. Courtney Stodden dressed up like a smutty Santa and ran around in a 'sexy' bikini in freezing cold weather just to prove she's, like, soooo hot.  Nothing like a supermodel in a Santa outfit to get your holiday off to the right start - and purge your memory of any image of Courtney Stodden. Heidi Klum posts a pantsless pic to get you in the holiday spirit!  Nothing trumps Gisele Bundchen rocking Santa lingerie at the Victoria's Secret Fashion Show. Nothing.  Katy Perry sure makes a sexy Mrs. Claus. Wonder what Russell Brand would look like as Santa ...  Never one to settle for one costume, Katy tries out another festivate ensemble.  Who could forget the Plastics doing a sexy version of 'Jingle Bell Rock' in 'Mean Girls'?  Supermodel Irina Shayk lends a helping hand to the ASPCA's Blessing of the Animals on Dec. 9.  Who knew Mrs. Claus was so foxy? LeAnn Rimes dons a sexy Santa suit to perform with the Gay Men's Chorus of L.A.  Just when you thought the Kardashians couldn't get more over-the-top, they've outdone themselves again. The reality show family unveiled their 2011 Christmas card, in which all 11 members strike a pose wearing tuxedo-style red carpet-worthy formal attire instead of traditional holiday wear. For an added touch of drama, everyone attempts their best 'Blue Steel' impression and gazes dramatically into the distance.  '90210' hottie Jessica Lowndes films a scene in which she gets to wear a very revealing Santa outfit.  Paris Hilton, have you been naughty or nice this year?  Who knew Santa had a six pack? Ryan Phillippe smolders in the 1998 flick, '54.'  Someone's going on the naughty list this year! Audrina Patridge hits up a Bongo event with two shirtless hunks by her side.  Jenny McCarthy is the prettiest Santa Claus we've ever seen ...  ... except for Michelle Monaghan in the 2005 film 'Kiss Kiss Bang Bang.'  'Reindeer Games' really showcased Ben Affleck's, uh, acting abilities.  Elizabeth Banks brings Christmas cheer to 'Fred Claus.'  Khloe Kardashian takes her adorable nephew Mason holiday shopping on Dec. 11.  Jenni 'JWOWW' Farley gets a bit handsy with Santa at a promotional event for her new perfume.  Snooki - clad in superhigh boots - gets an extra lift from her beau Jionni as the pair decorates their first Christmas tree together. 'Our first tree =),' the pint-sized 'Jersey Shore' star tweeted.  Little Seraphine hitches a ride on mommy Jennifer Garner on Dec. 9.  Christina Aguilera hugs it out with Minnie Mouse at the taping of the 2011 Disney Parks Christmas Day Parade.  'Dancing With the Stars' pro Karina Smirnoff opts for a sheer top and a Santa hat at an event in Vegas on Dec. 3.  We've heard of ugly Christmas sweaters but ... Justin Bieber donned a $1,650 red and cream snowflake-patterned sweater coat while performing on the 'Today' show on Nov. 23.  Bieber gets goofy with Goofy while shooting the Disney Christmas Parade.  'Dancing With the Stars' hostess Brooke Burke sits on Santa's lap in Century City, Calif.  Gwen Stefani's son Kingston Rossdale is on the run ... for Christmas presents?  President Barack Obama, Santa, Carson Daly, Kermit the Frog, First Lady Michelle Obama, and Sasha belt it out while celebrating the National Christmas Tree lighting ceremony on Dec. 1.  Nope, it's not summer and it's not a street corner, but Courtney Stodden is doing her holiday shopping in that outfit at the Grove.  Willow Smith has a ball with the Radio City Rockettes on Dec. 6.  Tina Fey gets in the holiday spirit on Dec. 10.  Tiffani Amber Thiessen takes her adorable daughter Harper Renn to Santa's Secret Workshop for her first Christmas.  La Toya Jackson coordinates her outfit with Santa's at the 80th Anniversary Hollywood Christmas Parade on Nov. 27.  Ali Landry takes her daughter Estella to the Working Elves' Santa's Secret Workshop. Looks like she fits right in?  Uh oh ... Katie Price puts a naughty spin on Christmas while promoting her latest book, 'Santa Baby.' on Nov. 2.  Marie Osmond gets merry with Santa at the Hollywood Christmas Parade.  All New York Giants Ramses Barden wants for Christmas is a Super Bowl win.  Tony Parker hangs out with Mickey and Goofy at the launch of Christmas Magic at Disneyland Paris.  Actors Constance Marie, Katie Leclerc, Vanessa Marano, Lea Thompson and Marlee Matlin help kick off ABC Family's 25 Days of Christmas.  Designer Betsey Johnson gets cozy with Santa Claus.  Gilles Marini takes his adorable daughters to meet Santa.  Tori Spelling and daughter Stella get in some bonding time while checking out Santa's Secret Workshop in West Hollywood, Calif.  Holly Madison gives the Christmas season her perfect 'Bunny' touch, sporting a sparkled pink Santa hat.
Although Hollywood may not have a white Christmas, 'tis the season to get in the holiday spirit with your favorite celebs.