When you’re in love, there’s no one who can measure up to the object of your affection. Just ask David Rush, whose latest promo single, She Ain’t You (leaked late last year but presented here in its finished form) finds him so enamored with his girl that not even a supermodel could persuade him to stray. Johnny Jam produces, backing the headliner’s declarations of loyalty and affection with club-ready synths, and Beluga Heights crooner Jason Derulo (currently on the mend after breaking his neck rehearsing for an upcoming world tour—feel better, man!) tops it all off with a smooth hook. This joint isn’t attached to any forthcoming project, but those digging it can keep it locked for the latest from David Rush in the weeks and months ahead.