This Halloween celebs had all types of fun costumes. Jessica alba looked really cute as Dora the Explorer ( I might have to steal this one for next year). Gwen Stefani went trick-or-treating with her kids dressed up as Jesse from Toy Story. Blake Lively went as as flight attendant. And Heidi Klum celebrated her 10th Annual Halloween party dressed up as a black crow. Which costume was your favorite? Did you dress up this year?