Adam Lambert has dumped on the singing in the Les Miserables movie.

The former American Idol runner-up, while impressed with the acting, has admitted he was less than thrilled with the actors' singing in the musical that was released in theaters on December 25.

"Les Mis: Visually impressive w great Emotional performances. But the score suffered massively with great actors PRETENDING to be singers. It's an opera. Hollywoods (sic) movie musicals treat the singing as the last priority. (Dreamgirls was good)," he tweeted Sunday.

"I felt like I should ignore the vocals and focus on the emotional subtext- but the singing was so distracting at times it pulled me out."

After praising the performances of Anne Hathaway, Helena Bonham Carter and Sacha Baron Cohen specifically, Lambert had more criticism for director Tom Hooper and the movie in general.  

"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?... Sorry for being so harsh but it's so True!" Lambert tweeted.

"And I do think it was cool they were singing live- but with that cast, they should have studio recorded and sweetened the vocals."

Once Lambert got mixed reactions from his followers in which some were supportive but others seemingly offended by his comments, the singer posted a follow-up tweet justifying his opinions.

"I'm so glad we are all discussing this now! Look-I grew up w this musical and so my expectations are quite high. Didn't mean to b negative," he said.

Lambert was beaten in American Idol's eighth season by winner Kris Allen.