I wandered into Power Ballad after finishing work early and I was glad I did - Paul Rudd is completely believable (his singing is not half bad too) the music is fun and even though it's nothing groundbreaking, it had enough emotional heft to get me invested and I enjoyed it a lot.
I would have liked to have seen more of the mother and daughter maybe, but as straightforward comedy drama films go I think this is definitely worth a look, and it cheered me up no end 