"The industry will say 'these actors were so brave to attempt singing this score live' but why not cast actors who could actually sound good?"
Only Anne Hathaway was singled out for praise, with Lambert saying the movie was worth seeing anyway for her "breathtaking" performance as the dying prostitute Fantine.
Crowe, who plays Inspector Javert in the film, was alerted to the rant by one of his followers on Twitter.
The notoriously fiery New Zealand-born actor held back and gave a measured response.
"I don't disagree with Adam, sure it could have been sweetened, Hooper wanted it raw and real, that's how it is," he said.
- Herald Online