Sending her security guard outside to count heads, the singer then sent out hot chocolate to the fans who had gathered outside to catch a glimpse of the 'Pokerface' hitmaker.
On tour in Europe for the past few weeks, the 24-year-old has been causing quite a stir with her trademark outrageous outfits, reported Daily Mail online.
Another fan she ran into this week was David Furnish, Sir Elton John's husband.
Gaga was recording a duet with John called 'Hello, Hello', which will feature in a new Disney film, 'Gnomeo and Juliet'.
Furnish tweeted a picture of himself with the popstar after they met at the recording studio.
Gaga's career is going from from strength to strength. and she has set a new record for YouTube, having racked up more than one billion overall views of her videos on the website
