Plus: Art Garfunkel scores one for the sidekicks.
Plus: "Lean on Me" and the curious case of cover songs hitting number one.
Plus: REO Speedwagon ushers in the weepy white guy ballad era.
A former Fresh Prince gets jiggy wit it.
Plus: Flo Rida triggers intense middle school flashbacks
Plus, The Beatles pull off an unmatched chart record.
And how the Spice Girls invaded the U.S.