Anja Nissen, sometimes known as simply Anja, is a Danish-Australian singer. She was the winner of the third season of The Voice Australia. Following her win, Nissen was signed to Universal Music Group and lists her influences as Celine Dion, Mariah Carey, Whitney Houston, Christina Aguilera, Toni Braxton and Stevie Wonder. In 2015, Nissen was the support act for Olly Murs on his Australian Never Been Better tour.

The Voice is an Australian singing competition television series. It premiered on the Nine Network on 14 April 2012, before moving to the Seven Network in 2021. Based on the original The Voice of Holland, and part of The Voice franchise, its first nine seasons aired on the Nine Network, with its tenth season commencing on the Seven Network on 8 August 2021.