Correction, it didn't take off until The Voice promo. Xtinct hopped on an already released song which is the exact same situation as S&M. And Scream and shout still is a multi platinum global smash, bigger than Feel This Moment even sooooooooo. No matter what you try to pull here Xtina is a loser and has been losing the entire decade. Let it go
Not when Moves like Jagger outsold every brit song
Also Britney's only credited for S&M for one week, so she has one week worth of chart points. Legend X is credited for the entire songs run lol.
Keep trying tho