Watch Cher's surprise performance of ABBA's song 'Waterloo' at the 2019 Met Gala

There's no denying the Met Gala was an event of epic proportions - need we remind you about Lady Gaga's 15 minute four outfit change performance on the pink carpet?

But the lucky star-studded attendees were also given a very special treat when the one and only CHER gave a surprise performance at the dinner!

The 72-year-old singer took to the stage in the Temple of Dendur at the Metropolitan Museum of Art's 2019 Costume Institute Gala at around 10pm and delighted the crowd with a cover of ABBA's Waterloo and a selection of her own biggest hits, including Turn Back Time and Found Someone.

Cher was introduced to the stage by Lady Gaga, who told the crowd to "sit down and shut up!"

"We have incredible performances tonight, and I ask you kindly to pay attention. Are you quiet? Are you focused? Are you ready?!"

Cher then walked out on stage in faded jeans, a silk camisole, black leather jacket and a platinum blonde wig.

Before she ended her performance, Cher told the audience how "proud" she was to have been asked to sing at the event, which had the theme Camp: Notes on Fashion.

She said: "I wasn't going to say anything tonight, but then I saw the First Monday in May documentary and it reminded me of when I was a little kid, and it made me kind of excited and depressed, and drama queen-ish. That's who I am.

"But I was really poor and dyslexic ... I had to wear rubber bands on my shoes. I was s*** poor, but I had this love of colour and painting and patterns and everything, fabric.

"When that 64 box of Crayola came out, I lost my mind. I wanted to be something, and I wanted to be more than just a singer and when I met Sonny he'd do anything I'd want him to do, so I just lived out my dream with him, and we just kept going. I just want you to know how proud I am to be here and be a part of this."

What a treat!