The striker caught the eye again at the weekend with a stunning winning goal against Blackburn Rovers.
That made it 21 goals for the season - six for us after joining us from West Ham in January and 15 for Hammers - and the 21-year-old has impressed all in his short time at the club so far.
"Jermain's all about goals," said Simon. "I didn't know too much about him before he came to the club but he wants to score all the time.
"He shoots from anywhere and is an out-and-out striker. He thrives on goals.
"People have talked about him in terms of going to the European Championships this summer and I'm not sure that there are many strikers like him who England can call on at the moment.
"I think England have to pick him because if he hits form, he'll score goals and can score a lot in a short space of time.
"I'm confident he'll go because someone who can finish like that can turn games in an instant. He will score goals no matter what, he's a natural goalscorer."
Look out for more from Simon in Digger's Diary later this week...
Simon Davies believes Jermain Defoe is worthy of a place in England's European Championship squad.