American singer-songwriter, Adam Lambert, looked frightfully alluring as he donned a gothic look (pictured below) for a Halloween-themed event held by Chicago's 101.9fm The Mix.

The vocal powerhouse has already treated fans to a special merchandise item for Halloween by selling a limited edition print of a photograph of himself called 'Ghost'.

A statement on the website, shown here, explains that the image was taken by Lee Cherry:

"In celebration of his favourite holiday, Halloween, we are making available for a limited time only, an exclusive metallic print of Adam Lambert, titled: Ghosts, photographed by Lee Cherry. These prints are available as an 8x10 or 16x20, and framed or unframed options are available."

The heartthrob has been busy flying all over the globe recently to promote his new single, 'Another Lonely Night', taken from his latest album, 'The Original High'. 

Joining in on the Halloween fun this week, Lambert was also in London, where he appeared on the popular UK TV show, 'Celebrity Juice'. 

The star is set to host his 'Ghost Town' Halloween party tonight (featured below) in Los Angeles at the Beverly Hilton in Beverly Hills.

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Watch Adam Lambert this week pretending to be Kim Kardashian on 'Celebrity Juice', performing 'Black Cat' at the Revention Music Center Houston, and his single, 'Ghost Town', below: