I just received this from a family friend and had to share it. This will bring a smile to your face -- guaranteed. Enjoy!
This commercial was shot at the Liverpool Street Subway Station in London several weeks ago (Jan 15, 09). Only the dancers knew what was happening; the general public didn't have a clue what was about to unfold. This Youtube site has had over 2 million hits in less than a month's time.

Oh My God!!! That was mad kewl!
The guy with the big hair dancing to "Lollypop" was my favorite!!!
Thank you fotr the morning happiness. :-)
Wow Too Much Made the morning.
Luke -- Isn't it great?? Just can't help but make you feel good.
Ralph -- Glad you enjoyed it. Have a great day!
This was e-mailed to me yesterday...
Isn't that something!
thank you for sharing this - it was GREAT!
How funny! The bystanders must have been wondering what in the world was going on!
Kathy
Toula--I love it. Just makes you feel happy!
Christina -- You are very welcome. I'm glad you liked it!
Kathy -- I know...can you imagine everyone around you starting to dance? Bet the world would be a happier place if that happened more often. :)
That would be wonderful to see live. A memorable visit to that subway station even if you were there every day.
Maureen -- I agree -- wouldn't it be fun if people broke into dance at any time??