I'm only going to do Britney since she's the only one I really care about..
Vocals: 7
She doesn't have the worst live vocals on earth, but she certainly isn't the best. I'd like to add though if it wearn't for me hearing one of her live performances for HATLM this rating would be a lot lower.
Dancing: 7
If I were reviewing her ten years ago, she'd of got a 10/10. Right now though she still proves she can go through the choreography while keeping up with her back up dancers which is all I can really ask for. Once she get's back into routine and get comfertable on the stage again she'll easily be getting 10/10 again from me.
Songwriting: 10
This myth that she can't write a song clearly needs to end. Go to youtube and search State of Grace.. it ***** all over any song that today's artists write. (With the exception of Amy Lee) As well Whiplash on Selena Gomez's WTSGD is the highlight of the album and guess what.. BRITNEY WROTE IT! Another thing I'd like to add is she did write a song for Femme Fatale Japanese Addition - Scary. Don't know why it didn't make the cut for the final tracklist because its a killer tune.
Performance: 10
Honestly, Even though she lip synced most of the Circus tour it was still amazing and I'd go see it again in a heartbeat! She knows how to put on a good show and all the posotives in the show overshade the negatives.
Total: 34