What's the Kennection? #40

According to the group's name, what redheaded frontwoman leads the London band called "the Machine"?

During a 1919 eclipse, astronomer Arthur Eddington proved Einstein's theory of relativity when he showed that light rays can do what?

What Massachusetts city lent its name to Sabrina the Teenage Witch's magical talking cat?

In the Disney movie Tangled, what does Flynn's much-less-glamorous real first name turn out to be?

The world's most common type of cement is named for what limestone island in the English Channel?

What's the "Kennection"?