Zoe Saldana has defended her Crossroads co-star Britney Spears when asked about the singer's use of auto-tune to enhance her voice.

Speaking on Watch What Happens Live, the Guardians of the Galaxy star said she thought it was mean that someone would release a version of Spears' song Alien before the auto-tune. "I have a huge amount of respect for Britney Spears," she said.

"I'm pretty sure that 80% of our musical artists would be mortified if they were caught singing without auto-tune."

Saldana said that Spears was a dream to work with on the set of the 2002 film: "She was the one big, big celebrity that I met when I was starting to work in Hollywood who was humble, and whatever was going on in her mind or in her world, it was never about hating her neighbour."

Saldana added: "I can name a lot of prominent figures right now that today are more famous than Britney, that literally got to where they're at by hating on Britney a lot because it was cool at one time to really just diss her. And Britney never did that.

"I do believe that people and children gravitate to good energy, and she's definitely an abundance of that."