Singer Katy Perry, who is spending the holidays in Denmark with her sister Angela, was spotted going arm-in-arm with a mystery man during an outing here.  In some photographs, Perry can be seen enjoying the male friend's company as they strolled down the street here on December 23 night, reports dailymail.co.uk. For the outing, Perry was wrapped up in warm clothes -- a grey jumper dress and leather thigh-high boots.

Katy Perry