No. 4: Charice, ‘Baby’
Is it cheating to include a cover by big-voiced songbird Charice, who's already a megastar in her own right? We say no — especially not when the vocals are this powerful and inspiring. Belting out Bieber's 'Baby' with effortless magnitude, Charice's cover of the pop smash, recorded casually in what looks like a hotel room, showcases the Filipino songstress' masterful delivery. Who needs swag when you've got pipes like this?