Sometimes, rock songs can top the pop charts, and these 1970s tunes prove that it's definitely possible to be a crossover ...

Soft rock, soul, R&B, disco, funk and hard rock all hit the No. 1 spot on the Billboard charts ... Billboard's top-ranking tunes for each year released. We guarantee some of these '70s songs ...

Then McCartney founded Wings and saw 14 more singles reach the Billboard Top 10 ... the Billboard chart. McCartney released ...