not sure why, careless whispers was not a wham song title, it was solo effort from one of the band members
No, it was released under the Wham! name. As always, the late George Michael wrote the song and did all the singing. Andrew Ridgeley (the only other member) was there to look good in shorts, dance about with an unplugged guitar and take part in the promotional chores.
George gave Andrew half the writing credit for Careless Whisper because he knew it would be an enormous hit, he knew he was about to go solo, and he wanted to set his mate up for life. He succeeded, and Andrew has lived as a comfortably-off surfer dude ever since.
For all his sexual weirdness (who are we to talk), his drug problems and his tragic end, George was good-hearted and generous to a fault.