"The Clapping Song" by Pia Zadora. Yes, that's the official title, in spite of what the video from her channel says. Is this the first time Pia Zadora has been posted for On That Note? Hmm...
"The Midnight Oil" by Barbara Mandrell. It's widely regarded as the first cheating song sung by a woman to be a country radio hit (1973). It was also her first number 1 country single in Cashbox (Billboard it stalled at #7).