Latin singer Shakira already started to film the blind auditions the fourth and upcoming season of 'The Voice'. She admits that being pregnant while taking on the new gig was difficult. The latin superstar told Access Hollywood, 'It hasn't been easy, but I have a lot of energy. I can go long hours- I'm thrilled to be here and I'm sure he is too.' She is set to give birth to her son soon. The fourth season of 'The Voice' premieres on March 25th.