Porsche is celebrating its 50th anniversary year of its 911 model and has created a unique video in tribute of its legendary car. The automaker has enlisted the musical talents of seven generations of the 911 to perform the “Happy Birthday” song that features 7 notes, which symbolize the seven generations of the iconic ride. The seven generations of the rear-engine sports car are lined up for a short recital that was captured on video. But before their big performance, the drivers let loose and did a bit of drifting inside a hanger, which makes us think…what’s more impressive: the symphony or the drifting. You be the judge!