The Maroon 5 singer posted cryptic tweets on the social networking site in which he blasted an anonymous star for ''recycling old art'' rather than producing original music.
He wrote: ''Ugh..recycling old art for a younger generation doesn't make you an artist. It makes you an art teacher ... I unabashedly love writing and performing pop music for both myself AND everyone around me. That's It. It doesn't need any extra sauce.''
While he didn't name anyone, the 'Applause' hitmaker took offence to the tweets and sent out a message to her own followers seemingly in response to the 'Moves Like Jagger' star.
She said: ''Uh oh guys the art police is here.''
Gaga might be justified in assuming she was the target of Adam's rage, given her new music video features a number of famous works of art.
He also isn't the only musician to accuse her of stealing from other works, with Madonna claiming 'Born This Way' was a ''redo'' of her track 'Express Yourself'.
She previously said: ''I thought, this is a wonderful way to redo my song. I mean, I recognized the chord changes. I thought it was . . . interesting.''
She's been separated from her family for too long.
The actor is reportedly in talks for the coveted role.
His new song 'All The Way Up' references speculation over marriage.
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