Awesome choices, @stickupboys and those would be among my top contenders (along with Billy Joel, and a few others) if I'd gone with my favorite 70s singers (since I "discovered" them then). And you can definitely choose your own, since there's still some hours left before the deadline of the contest at the end of day on the 9th - check out this post for the details...
I'll keep my eyes open for your entry and good luck! 😊