Billie Eilish is a trooper. 

The 21-year-old superstar did not disappoint her fans in Ireland Friday night, even though she was quite ill.

The down-to-earth artist, who stunned her fans by flying economy, gave it her all to the 50,000 people who had come to see her at Electric Picnic 2023 in county Laois.

The Grammy winner singer sent a message to her fans on social media, writing, ‘Ireland.  I am really, really sick and honestly, really suffering.’

Referring to her work ethic she continued, ‘You know me and you know that I wouldn’t cancel a show if I was like literally dying… (this does feel pretty close tho lol) but the show must go on.’

Trooper: Billie Eilish, 21, was a trooper Friday night, taking the stage in Ireland after warning the crowd she was ‘really, really sick’

‘I will see you tonight,’ the What Was I Made For artist penned.

She then asked for some consideration completing the message with, ‘Please keep in mind that I am trying my best and I’m gonna need your help tonight. Go hard for me ;)’

In a video shared by Leinster Express from the top of the show, the ailing hitmaker sounds a little stuffed up as she speaks into the microphone.

The Lovely singer asked the crowd to ‘give me all that you’ve got, okay, because I can only do so much tonight.’

She then ordered them to build up the energy by bouncing with her.

‘If I can do it, you can f**cking do it,’ she told them.

Billie opened the show singing You Should See Me In a Crown while bouncing across the stage.

Message: The ailing singer delivered a message ahead of her show at Electric Picnic 2023, asking her fans to ‘go hard for me ;)’

Bounce: Billie began her 70 minute performance by asking the crowd to bounce with her before performing  You Should See Me In a Crown

Cough: Billie was heard coughing and sniffling during the show, but kept going until the end

Billie Eilish stars in retro inspired montage showing off Nikes

The Billboard Music Award winner chose a loose fitting white  Nike top over black basketball shorts, with black socks and white sneakers for the performance.

She placed a cap that with the word ‘Danger’ on it over her dark hair.

The crowd can be heard singing Happier Than Ever along with the artist, who had to pause to cough in a fan video shared on Instagram.

To build more of a community feeling among the audience, she asked them to turn to the person next to them and give them a hug, according to Independent.ie.

The outlet reported Billie closed the 70 minute show telling the crowd, ‘I love you so much, thanks for having me, but I’ll see you again. ‘

The Bad Guy artist should have time to get some rest.

Her next performance isn’t scheduled until September 16 in Atlanta, according to her website.