Glen Campbell
FILE - In this Sunday, April 25, 2010, file photo, U.S singer Whitney Houston performs in London as part of her European tour. Houston, 48, died Feb. 11, 2012. (AP Photo/Joel Ryan, File)
Roger Waters is building "The Wall" live in concert Friday at Wrigley Field, Chicago. June 8, 2012. | Scott Stewart~Sun-Times
Bruce Springsteen & the E Street Band live in concert Friday night at Wrigley Field. | Scott Stewart~Sun-Times
Lollapalooza, Frank Ocean, in concert on the Google Play Stage Saturday evening. August 4, 2012. I Scott Stewart~Sun-Times
2012 could go on the books with not one but numerous major musical headlines. It was the year electronic dance music supposedly broke through (again). It was the year YouTube took the wheel, driving some of the chart’s biggest hits (“Call Me Maybe,” “Somebody That …