Adam Levine and Lady Gaga are fighting on Twitter.

As a result we are urging all Americans to step away from the Internet until the nasty spat blows over; we wouldn't want anyone to get hit by shrapnel.

Levine blasted Gaga on Friday -- or at least he blasted someone that he did not identify, and most readers quickly realized he was talking about Gaga.

"Ugh ... recycling old art for a younger generation doesn't make you an artist. It makes you an art teacher," wrote Levine, the frontman for pop band Maroon 5 and a star of TV's "The Voice."

"I unabashedly love writing and performing pop music for both myself AND everyone around me," he added. "That's it. It doesn't need any extra sauce."

We're not sure why a guy who writes songs like "Moves Like Jagger" needs to go around lecturing people about "art." On the other hand, that "extra sauce" metaphor was pretty deep, no?

Gaga issued a terse response to Levine's perceived slap.

"Uh oh guys the art police is here," she tweeted.

Shouldn't that be "the art police are here?" Just saying ....

Perhaps Levine was chiding Gaga over the view held by some that her songs are little more than repackaged Madonna songs. Or maybe he was objecting to the comments she posted after she released the single "Applause," in which she seemed to hold herself above some of her peers.

"'Applause' is a very meaningful song to me, because it addresses what many think of 'celebrities' today, that we 'do it' for the attention," she tweeted Sept. 18. "But some of us are 'artists' in this group called 'celebrity,' & what we create doesn't live on unless theres an audience to remember it. So I may need your attention at first, so I can sing you my song. But its the 'Applause' after that let me know if I've entertained you."