Which song was Elton John’s seventh number one hit?

This song was this iconic artist’s seventh number one hit in the early 1970s.

The song was actually a tribute to US tennis star, Billie Jean King.

It was released in 1975 and was covered by Hall and Oates in 1991.

It was certified platinum in 1995 and has been adopted as an American state’s song of patriotism…

Any clues as to what it is?

Listen to “Philadelphia Freedom” by Elton John below!