Hollywood celebrated Halloween in a spectacularly over-the-top fashion on Sunday - with a nod to vaccinations, a sizzling red cat and a Mars Attack character at the helm of the looks. Zoe Saldana got in the spirit of things in sensational style Cult classic: Kourtney Kardashian and Travis Barker have dressed up as Clarence and Alabama from Quentin Tarantino's 1993 …
