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"Usher has praised his fellow Voice coach Shakira for her competitive spirit. Shakira has already acknowledged that there has been &amp;quot;a lot of tension&amp;quot; among The Voice&amp;#039;s coaches during auditions, with Blake Shelton also calling season four the most competitive yet.   &amp;#039;U Got It Bad&amp;#039; singer Usher backed up his fellow coaches&amp;#039; comments, adding that he has been particularly surprised by Shakira. &amp;quot;[Shakira is] comic relief, super f**king serious, and gangster,&amp;quot; Usher quipped, according to Billboard. He added: &amp;quot;She&amp;#039;s so nice now but she really pulls out that switchblade in the battle!&amp;quot; Levine expressed agreement with Usher&amp;#039;s comments, in addition to mentioning that Shakira never fails to use her femininity to her advantage. &amp;quot;That&amp;#039;s one thing we can&amp;#039;t compete with really,&amp;quot; Levine admitted. &amp;quot;So she&amp;#039;s smart!&amp;quot;  Shakira previously commented that coaching The Voice while pregnant &amp;quot;hasn&amp;#039;t been easy&amp;quot;. &amp;quot;I have a lot of energy. I can go long hours,&amp;quot; Shakira declared more positively. &amp;quot;I&amp;#039;m thrilled to be here and I&amp;#039;m sure he is too.&amp;quot; The Voice premieres season four in March on NBC. Watch a trailer for the series below (US only):  "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/the-voice/news/a448678/the-voice-usher-shakira-is-super-fking-serious-about-winning/>