"Alka Seltzer" by Roy Lichtenstein, 1966: Effervescent Pop Art.

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"Alka Seltzer" by Roy Lichtenstein, 1966: Effervescent Pop Art.
Roy Lichtenstein Seascape I from New York Ten 1964, published 1965
Roy Lichtenstein (1923–1997) Mirror Painting 1969 — oil and Magna on canvas
In Plagiarism and You(Tube), Hbomb says "If you consider something so obscure you can get away with stealing it, you do not respect it." Save that line for the next time someone tries to tell you that Roy Lichtenstein brought respect to comics as art.
It's since been pointed out that while Lichtenstein did copy one of Russ Heath's drawings of an airplane getting hit, the painting depicted above was actually copied off Irv Norvick, because Lichtenstein did this so many times to so many comic artists.
In Lichtenstein's defense, he was doing this in a time when comic artists frequently weren't even credited in the issues themselves. In his condemnation, he never even tried to check, nor has he made any move to pay or credit any of the comic artists who recognized their own work later on. Rather than elevating the "low art" of comics, he was widening the gap of financial success and respect even further.
The Hbomberguy of this story is art historian David Barsalou, who has now spent decades tracking down the original art and the names of the original artists used in Lichtenstein's most famous output. Here's the flickr gallery for the Deconstructing Roy Lichtenstein project. Frequently copied were Tony Abruzzo, Ted Galindo, Mike Sekowsky, Joe Kubert, Jerry Grandenetti, and dozens more Golden Age artists who aren't very well known in comics circles, let alone art history books. Many of them died in poverty. That's something that the Hero Initiative, mentioned in Russ Heath's comic above, aims to prevent.
Also, Lichtenstein didn't even paint Ben-Day dots. That's a specific thing.
by Roy Lichtenstein, 1964
Roy Lichtenstein, Sinking Sun, 1964
Roy Lichtenstein, Modern Painting with Bolt, 1966
Boom! (Retro)