Saatchi+Saatchi

Saatchi & Saatchi (London) did this for T-Mobile.I love how throughout the ad, you don't actually even know what the product or bran the ad is promoting, but it is still very captivating.
Also, there is a sense of unity and it puts a smile on your face. This is a huge crowd being filmed in a live setting. It makes you sort of wonder how did Saatchi & Saatchi pull this stuntoff so successfully?
Hats off to S&S and T-mobile.