Christina Aguilera is a legend....she isnt overrated....she's only getting ready for a new phase but she still keeps being the most female singer all over the world..the powerfull voice...she has more than 10 years of carrer.. In my opinoin, legendary female singers :Christina Aguilera and Alicia Keys cause bothe of them have a great voices...how about anothers,just sales and rip-off...