Kiwi songstress Lorde has revealed she plans to celebrate her 21st birthday in September by "drinking a yardie" as quickly as possible.

Appearing on Australia's The Project last night to promote her new album Melodrama, the Grammy Award-winner assured fans she still has her feet firmly planted on the ground.

Drinking a yard glass full of beer is a New Zealand tradition at 21st birthdays. It is unclear, however, if the star will return home to celebrate here.

Despite her fame and glamorous lifestyle Lorde insists she's still a "giant loser".

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"I think that I maybe am five per cent prettier (these days) I would estimate, but apart from that I think I'm still a giant loser. So it's all good, really," she told The Project.

Lorde also explained how in some ways she's braver now than she's ever been before, the Daily Mail reports.

"A lot of people have said to me this album is emotionally laid bare, I think. That sort of bravery I don't necessarily know that I had five years ago."

Lorde will be returning home in November to perform seven shows as part of her Melodrama world tour.