Though CRJ has a completely different singing style than Laura Osnes (pop v. classic Broadway lyric soprano), CRJ is a more than capable actress, as you can see in the clip, and she has what I'd call an "enchanting earnestness" about her on stage that makes you really root for her. She was a more than adequate replacement for the wonderful Laura Osnes. Many people gave her a bad (and unfair, in my opinion) rap.
CZJ at opening night party for A Little Night Music, Dec 13, 2009.