HELP WITH ARTIST OF COOL 'POP'(?) ART PAINTING

I found this today at a local thrift store - at first I thought it was the French Quarter but then realized it is Brazil.
I tried googling Monteiro artist, but a few came up - and none that I found whose first name ended in EO
Is this pop art? Caricature art?
Any help would be appreciated
Thanks!

 

Could be him. Lady looks similar and the siggie.

 

Maybe try Pinteiro

 

Now I see that the side with the siggie was folded over the frame.

 

My usual parrot question... Would you be kind enough to post a close-up photograph of the sticker on the back?

Debora

 

Signs himself LM also. Seems to have quite a lot of work online.

 

Debora I was going to take a photo of it but it's just a sticker for the framing company - It looked like a Michaels sticker but it's another large art/frame store I can't remember at the moment (I just woke up) celebrating it's 35th anniversary - I will get a photo of it later but here's 1 taken from last photo above