 During the second blind auditions of The Voice UK , which was aired on March 31 , 2012 , Denise Pearson ( credited as Denis Pearson ) covered " Fighter " . She was selected to Sir Tom Jones team as a result . American actor Darren Criss , portrayed as his fictional character Blaine Anderson , performed the song on the episode " Big Brother " of US popular TV show Glee , aired on April 10 , 2012 . The version peaked at number 58 on the Hot Digital Songs and at number 85 on the Canadian Hot 100 . Singer CeCe Frey , a participant of the second season of US show The X Factor , made a cover of the song . Sylvia Yacoub from Aguilera 's team on the third season of The Voice also recorded a version of the song . 
