Xtina should do it fist, she's a has-been, while Britney just flopped with her album because she didn't promote it, but is selling out her Vegas shows unlike Floptina who had to cancel the "Bionic" tour because no one was attending! And not to mention there wasn't even a "Lotus" tour planned... HAS-BEEN! Lady GaGa i don't care about her and i think she's over as well, but not as much as Floptina...