We'll let these ladies duke it out amongst themselves!
This morning, Spice Girl and new X-Factor Australia judge Mel B. was put to the test to pick the best voices out of a line-up of famous singers. Thing is, she didn't know she was listening to famous people sing!
In fact, of the latter, she was glad she hadn't chosen her, calling her a "bitch!"
Whoa! Where's all this coming from, hun?! What'd Madge ever do to you???