Demi Lovato has dedicated a song to Bruce Jenner.

The former Olympian confirmed in a TV interview last week that he is transgender.

Speaking to fans at a show in Auckland at the weekend, US star Lovato praised Jenner's honesty.

Before performing the track 'Warrior', the singer said:

"I want to dedicate it to someone who became an even bigger hero last night - Bruce Jenner!"

"By the way, never ever thought I'd dedicate a song to him but he was honest and he was open with his story. 

"No matter if you agree with it or not, he probably saved so many lives and educated so many people [about] transitioning into becoming a woman and being transgender and what that's all about. 

"So yeah, I just want to dedicate it to Bruce Jenner."

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Watch Bruce Jenner being interviewed below: