Green Day's Billie Joe Armstrong compares Trump to 'acid gone bad'

"I f***ing hate Donald Trump so much," Billie Joe Armstrong whispered into the microphone at a small concert at Cannes Lions.

Billie Joe Armstrong, of Green Day, performs 'Bang Bang' at the American Music Awards at the Microsoft Theater on Sunday, Nov. 20, 2016, in Los Angeles. (Photo | AFP)

CANNES: Rock band Green Day's Billie Joe Armstrong has compared US president Donald Trump to "acid gone bad".

Armstrong got political at a small concert at Cannes Lions on Wednesday night, reports variety.com.

He performed a set of a dozen songs at a private party hosted by Live Nation atop a chateau in the south of France. He improvised friendly chatter between songs, telling the story of how he met his wife.

He introduced his son Joey, who twirled the drums onstage. And then Armstrong got to a performance of "American idiot", from Green Day's 2004 album inspired by the Iraq War.

"Back then, if I look at a collage of one of those songs, it's become real life," Armstrong said.

"Without getting too political, it's important we look out for each other and show compassion."

"I f***ing hate Donald Trump so much," he whispered into the microphone.

"I used to scream I hated George Bush. This one is a little different. This one is bad, it's like acid gone bad. F***ing LSD and the American Right, man."

Armstrong's set included a cover of "Rockaway beach" and some hits from Green Day's album "Dookie". He closed with "Time of my life".