Album review: ‘Lotus,’ by Christina Aguilera

Say what you will about Christina Aguilera, but you can’t say the girl can’t sing. If you’re a fan of technically proficient power vocals, you’re likely a fan of her singing — if not always her work. Aguilera’s voice is flawless, so the success of her albums typically depends on how willing the public is to buy in to whatever persona she is trying on, be it sexy, empowered bad girl (2002’s “Stripped”), sexy jazz baby (2006’s â�...