What was rita first song?

Please provide more context! Which Rita are you referring to?

There are many famous musicians with the name Rita, including:

* Rita Ora: Her first single was "R.I.P.", featuring Tinie Tempah.

* Rita Coolidge: Her first single was "We're All Alone," released in 1972.

* Rita Lee: Her first solo album was "Build Up" in 1970.

To help me find the correct answer, please specify which Rita you are asking about.