Watch: Anja stuns in super-sexy sequinned skin-tight dress at <i>The Voice</i> grand finale

Wowser! Anja Nissen's final performance on The Voice Australia sure was a sexy one.

The 18-year-old hit the stage for the grand finale in a sequinned skin-tight dress as she revisited her battle round tune 'When Love Takes Over' by David Guetta.

TheFIX can't believe that's the same NSW country girl who rocked the battle rounds to the same song alongside former contestant Sarah Hamad.

Compare the two performances in the videos below…

The final three in this year's Voice came down to Anja, Johnny Rollins and Jackson Thomas. But it was Anja who took home the winning place.

See her sexy transformation throughout the competition in our gallery below...

For more of The Voice, head to the official site.