Tony Orlando and Dawn is an American pop music group that was popular in the 1970s, composed of singer Tony Orlando and the backing vocal group Dawn (Telma Hopkins and Joyce Vincent Wilson). Their signature hits include "Candida", "Knock Three Times", "Tie a Yellow Ribbon Round the Ole Oak Tree", "Say, Has Anybody Seen My Sweet Gypsy Rose", and "He Don't Love You (Like I Love You)".

Source: Wikipedia (https://en.wikipedia.org/wiki/Tony_Orlando_and_Dawn)