1970s Hits: This singer's "Escape (The Pina Colada Song)" was the last #1 of the 1970s...?

Questions

This is the most covered song of all time.?

This Madonna song became an athem for Pro-life activists.?

This novelty song about a "toy" is Chuck Berry's only #1?

This Rolling Stones hit was released the day after Brian Jones' funeral.?

Weird Al's parody of this song is "Rye Or The Kaiser"?