Demi Lovato: Z Festival 2012!

Demi Lovato hits the stage during the 2012 Z Festival in Rio de Janeiro, Brazil on Saturday night (September 29).

The 20-year-old singer pulled out all the stops for the show, performing hits Give Your Heart a Break and Skyscraper.

PHOTOS: Check out the latest pics of Demi Lovato

Demi Lovato, I mean, I dont know too much about Demi, Olly Murs, who competed on the UK X Factor back in 2009 told MTV about her judging on the US version.

But hearing about her from the States and hearing about her from the likes of One Direction speaking about her, obviously shes a very lovely girl, fun. Shes obviously a great singer and great performer as well, he added.

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