Why Lizzie Marvelly might struggle singing the national anthem for the All Blacks tomorrow

Elizabeth Marvelly says she'll front up to sing the national anthem before the All Blacks game against Wales tomorrow night, despite coming down with a cold. Photo/Michael Craig

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".

Tomorrow's anthem will be brought to you by... But I'm gonna give it my all and sing it out loud for the ABs. pic.twitter.com/EdChfHms9N

— Lizzie Marvelly (@LizzieMarvelly) June 10, 2016

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.