The third of the challenges requires you to dance in front of 10 different birthday cakes, and once you've done that you'll get a spray. We've done the legwork and put the locations of each of the birthday cakes on the map, which you can find below. There's also a list of the locations, along with a short description on where to find the cakes. Alternatively, you can watch the video above to see us find each of the cakes and do a little jig.
With all three challenges complete, you'll unlock a special back bling for your character. You've got up until August 7, when the event will no longer be active. You can see an image of the new Back Bling, along with the details for the three challenges, below.