Lauren Conrad as a ghost bitchfacing the camera accompanied by some undead dude
She studied technique from Tavi Gevinson.
Ellen Degeneres as Modern Family's Sofía Vergara...
...At the point her dress famously malfunctioned at this year's Emmys
Moms across America thought this was a riot.
Deryck Whibley and girlfriend Ari Cooper as Avril Lavigne and Chad Kroeger
To which Kroger retorted: "Hey Deryck loved the costumes! we were going to dress up as you guys this year but all the parties had celebrity themes haha!" Nickelback fans have since retweeted the quip more than 1,650 times.
Heidi Klum in utter distress over the decision to cancel her annual Halloween bash in the aftermath of Hurricane Sandy...