Who was the first African American woman to be promoted to principal dancer at the American Ballet Theater in 2015?

The art movement of the 1960s relies on perceptual anomalies of the human eye to create dynamic effects

You know what i love about this sight when ask a dumb question it is immediately answered but when i ask a real question it takes hours to get answered

How is pop music related to popular music? what theme does pop music typically discuss in the lyrics? why do you think this theme relates so much to lots of different types of listeners? describe one pop song that uses this theme. what is disco? when did it develop, and what characteristics set it apart from other genres of popular music? what was the british invasion? which famous group was a part of this movement? what impact did the group have on pop music? what is a boy band? what are some characteristics of a boy band?