The Voice

Alicia Keys has announced that she will make a guest appearance on NBC's singing competition, "The Voice." The singer confirmed the news via Twitter, revealing that she will be a mentor for Pharrell Williams' team.

Earlier today we saw NBC delivering the first full trailer for its upcoming 'Constantine' adaptation, but the network had plenty more to give in advance of the Upfront presentation tomorrow. Not only has NBC set the basic structure of its fall lineup, breaking up its Thursday comedy lineup and keeping 'Parks and Recreation' on the bench for the moment, but the network has also released full traile

The petite powerhouse known as Shakira performed her big, bold and beautiful ballad 'Empire' on 'The Voice' last night (April 22). It was a fiery performance, quite literally, with pyro blazes igniting behind the black-clad and supremely sexy singer. But the perf did raise some questions.