I think she's awful although her music spoofs are probably the least terrible thing about her shows.
Saw the Sharika one last night. I think part of the problem is that most of the groups/artists she is 'impersonating' are not musically particularly interesting or distinctive. When Pamela Stevenson did her Kate Bush parody 30 years ago it was hilarious not just because it was so well written and observed - it was about someone unusual that people had a strong reaction to good or bad. I mean who, outside of their fanbase, gives a damn about Shakira, The Sugababes, The Wanted, Sean Kingston, Mr HuRABon and The Hoosiers?