Rock shock: Nation's No. 1 oldies station changes formats NEW YORK It's the day the music died. W-C-B-S F-M in New York, the top oldies station in the nation for more than three decades, stunned its legion of listeners by abruptly switching formats this weekend. Goodbye, Buddy Holly and the Beach Boys. Hello, Duran Duran and Jet. The station had switched to an oldies format in 1972, initially as a bastion for the doo-wop sounds of the '50s. Although the playlist changed over the years, W-C-B-S F-M always remained the outpost for classic Top 40 radio in the nation's largest...