Lizzie Marvelly says she will "give it my all" singing the anthem before the All Blacks game tomorrow - despite coming down with a hellish cold.

The Auckland-based singer is due to sing the New Zealand national anthem before the game at Eden Park, which sees the All Blacks take on Wales for the first in a three-test series.

But Marvelly tweeted a photo showing how much medication she was taking - including Strepsils and Vicks Vapodrops - to help overcome her illness.

The collection of medicines also included nasal sprays and "ear nose and throat tonic".

Advertisement

In subsequent tweets, she said she was taking "the strongest s*** I can lay my hands on," and, "Thank God they don't drug test the anthem-singers".

As long as she doesn't do anything to end up on a list like this, she should be fine.