Courtesy ABCEach year, celebrities wow us with their inventive, beautiful, or just plain wacky costumes. Grab some last minute inspiration for your All Hallows Eve getup from the stars, ahead.First: Kelly and Michael always go all out for Halloween. This year Kelly Ripa wore a ski cap, plaid hoodie, baggy pants and stubble to transform into Jesse Pinkman from Breaking Bad. While her partner in crime donned a yellow Hazmat suit and protective mask as Bryan Cranston's Walter White.InstagramNicole RichieNicole Richie and friend dressed as Twins Arnold Schwarzenegger and Danny Devito.TwitterJoan RiversJoan Rivers dressed up as Miley Cyrus at the VMAs for Fashion Police.FameFlynetMartha StewartMartha Stewart as the Good Witch at HUB Network's First Annual Halloween Bash.FameFlynetRico RodriguezRico Rodriguez from Modern Family channels his inner zombie.InstagramChris ColferGlee star Chris Colfer as a sexy R2D2 of course.InstagramNina DobrevNina Dobrev takes a selfie dressed as Jason from Friday the 13th.

TwitterNaya RiveraNaya Rivera dons a Carmen Sandiego costume for Kate Hudson‘s Halloween Party on Saturday night (October 26) in Los Angeles.Getty ImagesBethenny FrankelBethenny in Candy Land with her completely edible candy set. Getty ImagesNicole 'Snooki' Polizzi and Jennifer 'JWoww' FarleyThe pair went as Tweedledee and Tweedleddum to the Snooki and JWoww Halloween Event: 'Night Of The Living Drag' in New York City.TwitterLea MicheleLea Michele transformed into a German beer maid with a short dress, lace-up corset and black thigh-high socks.SplashNewsAaron PaulBreaking Bad star dresses as ... your guess is as good as ours!FameFlynetKelly Ripa and Michael StrahanThe dynamic TV duo got into the spirit of Halloween by dressing at Christina Aguilera and Randy Jackson.FameFlynetJenny McCarthy...unleashes her inner cat with this little number.FameFlynetHarrison FordFord enjoyed Halloween night with the neighborhood kids in Brentwood, dressed as ... an old man?FameFlynetFergie and Josh DuhamelIs that Fergie and Josh—or Angelyne and Dennis Woodruff?

We think this is a rather obscure choice for the couple. Angelyne is a model and actress most known for purchasing billboard advertising for herself, whilst Dennis Woodruff is a filmmaker who makes homemade movies starring himself.FameFlynetSandra Bullock and Louis...looking adorable as a Toy Story duo.Getty ImagesHeidi KlumThe model, who hosts a Halloween party every year, never fails to disappoint in the costume department.usmc frog shirt for saleGetty ImagesShenae GrimesThe 90210 star is hardly recognizable in this costume.gnar hoodiesGetty ImagesKim KardashianKim looks just look a modern day fairy tale character in this Little Red Riding Hood getup. telluride hoodieAnd is that Scott Disick as the big bad wolf?diamond supply co eternal hoodie

TwitterDwayne JohnsonThis is a rather fitting costume for The Rock. He already had the muscles—he just needed to add the green paint.TwitterMiranda Lambert...dresses as the Queen of Pageants, Miss Honey Boo Boo.SplashNewsMatthew Morrison...at the Patron Cafe Halloween party looking very baby-esque.TwitterMiley CyrusTwerker extraordinaire Miley channels her inner Nicki Minaj.TwitterKaty Perry and Shannon WoodwardPosing with Daria and Jane's trademark nonchalant looks, these best friends salute the MTV animated cult show.hoodie allen laptop stickerTwitterJessica Simpson, Eric Johnson and MaxwellThe family that dresses up together, stays together. gamzee hoodieAnd now let's all just take a moment to appreciate Maxwell as a teeny tiny chick.TwitterJennifer Lopez and Casper SmartAnd we 'heart' hippie costumes too!TwitterWe had to look twice at Leann Rimes and Eddie Cibiriana's costumes to make sure they weren't the original Danny and Sandy.

"MythBusters" took on two of "Breaking Bad's" biggest science talkers from season one on Monday night: Whether hydrofluoric acid can dissolve "organic matter" and the bathroom it's in, and if mercury fulminate can cause the type of explosion as seen in drug dealer Tuco's office. The verdict on both? Chemistry teacher Walter White needs to go back to school, because the gang at "MythBusters" easily busted both "crystal myths." Discovery's hit show first tested the hydrofluoric acid to see just how much the toxic substance can do. Using small samples of each item found commonly in bathrooms (as seen in our exclusive clip), the busters — with some help from UC Berkley's chemists — learned that the HF acid didn't do much of anything. The steel, linoleum and wood were pretty much unaffected, while the drywall was turned into a "soupy mush." The little piece of pork that substituted as the dead criminal was a bit softer, but nothing like the bloody glob that crashed through Jesse Pinkman's hallway ceiling.

But then the busters wanted to go big ... really big. Not satisfied with the very small scale experiment, they built a bathroom in the middle of a desert and put a pig carcass (minus the head) into a cast-iron tub. On "Breaking Bad," Pinkman used two gallons of the HF, but "MythBusters" used something even stronger: 6 gallons total of sulfuric acid and what they called "special sauce." (As the show noted, they're not in the business of teaching criminals how to dispose of bodies.)Pig goo that "MythBusters" star Jamie Hyneman called "one of the ugliest things I've ever seen." But even the stronger stuff (which Walt and Jesse didn't use on the show) wasn't able to make a dent in the tub or the flooring. To test the mercury fulminate, the gang first put 5 grams of the stuff (wired to a squib) inside a pumpkin to see whether it would even explode. To say that it did would be a bit of an understatement. The gourd was blown to smithereens. The busters then went big by building a replica of Tuco's office, complete with windows, desk and dummies.