What? A scantily dressed Aguilera in a pink wig, a black barely-there dress (that revealed a whole lot of cleavage) and knee-high boots worn with fish-net tights.
Where? Pre-party posing outside of her Beverly Hills home.
Verdict? We're all in favour of fancy dress, hell who doesn't love trying on a wig and crown, but this ensemble is more smutty than spooky-chic. Seriously, the orange plunge bra? On the plus side she did work a fabulous pearl necklace that clearly charmed her Knight in shining armour.
With all that candy floss pink, we'd almost forgotten about her dip-dye look or the miraculous blonde locks seen for her latest perfume launch. What do you think of these contrasting looks? Browse through our gallery below for a little hair inspiration...