Here's a sampling of popular music across the decades. It's a list of the albums (remember those) that topped the Billboard 200 chart in 1969, 1979, 1989 and 1999.
A testament to their long careers, a few artists show up in this list more than once — a couple in different decades. Also, interesting to note that while 10 albums hit No. 1 in 1969, a whopping 22 albums topped the chart in 1999.
— Source: Billboard.com