Lorde battled sickness to take the stage at last night's triumphant homecoming gig in Auckland, according to social media.
Tweets indicated the 17-year-old double Grammy winner was late on stage at Silo Park because she was throwing up.
During her performance her manager Scott MacLachlan praised the singer on Twitter, saying:
Bravest girl in the world. If you only knew NZ. http://t.co/s2AxNOxTy9
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Two of his followers asked for an explanation but there was no update.
Read a review of Lorde's concert last night at Silo Park: Lorde live: Glowsticks, f-bombs and two new covers
About two hours later, a tweet from the Splore music festival account revealed the singer had been sick before the show.
LORDE was late on stage because she was vomiting. What a pro! #fact
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The nearly sellout crowd was none-the-wiser, with her show receiving rave reviews.
Mr MacLachlan did not go into detail about what was wrong with Lorde, simply saying she had been unwell.
"These things happen and she's had a busy three or four days, and also just got off a flight.
"She's definitely feeling better. It was an incredible crowd and and incredible show because it had a real homecoming feel so I think she thoroughly enjoyed it,'' he said.
Meanwhile, Lorde's Twitter rant slamming New Zealand media for being pushy at Auckland Airport has made headlines overseas.
A series of tweets from the singer - which were quickly removed - have been published by British music magazine NME and entertainment website E online.
"nz media almost pushed over myself and my family at the airport this morning in order to get their shots. bit of a sad welcome if i'm honest,'' one of the tweets read.
"i understand that people of note are supposedly fair game for everyone to photograph and film but that doesn't make it acceptable.
"i'm beginning to get used to my image as a public commodity, and the fact that I'm getting used to it frightens me,'' she said on the social media site.
Fans of local double Grammy-winning artist Lorde give their opinion on her concert at Auckland's Silo Park.
Originally on the lineup for the Laneway Festival last Monday, a make-up show was arranged after the singer was booked to perform at the Grammys.