These songs came out back in the day, 1979.
Enjoy....
This is it is sung by Kenny Loggins
https://www.youtube.com/watch?v=U8SSdyflGN4
At 2:11 in you'll hear Michael McDonald on background vocals.
The Doobie Brothers countered with "What a Fool Believes"
https://www.youtube.com/watch?v=XDLVHLomaUw
I report, you decide!!!