I feel suddenly bombarded with the faces, sounds and shoulder-popping moves that drove me into the dance studio as a kid. Britney, the Backstreet Boys and New Kids on the Block are ALL making a come back in 2011? Brace yourself. I grew up choreographing dances (and cartwheel and backflip-heavy gymnastics routines) at gym practice, at school (to the chagrin of the yard duty ladies), on my mom’s front and back lawns, in her living room and my friends’ parents’ living rooms. (Luckily, those home videos have yet to become digital.) Then, enter pop music. My world opened up. I could...