This stacked area chart visualizes the cumulative popularity of the top four music artists across years, using data from a songs CSV file. Built with D3.js, it employs `d3.stack()` to layer cumulative values and `d3.area()` with a step-after curve to render each singer’s contribution. The chart includes axes, labels, and an HTML legend, with colors mapping to artists via `d3.scaleOrdinal`. Data is aggregated in `index.js` before rendering through an SVG canvas.