Pink left 'speechless' after spotting fan's X-rated sign at Melbourne concert: 'Don't know what to say'

Pink was left stumped during a show in Melbourne on the weekend, when she took a break in between songs to read out a fan's X-rated and cheeky sign.

The So What singer, 44, was taken aback and left "speechless" after spotting the sign that read: "You, me, Carey threesome?"

"That sign says, 'you, me, Carey threesome?' I don't know what to say," Pink told the thousands in the crowd.

Watch the video above.

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She added with a laugh: "I'm not often speechless!"

Pink, whose real name is Alecia Beth Moore, took the sign in good spirits, reposting a clip of the moment on her Instagram stories and to her more than 10.6 million followers.

A clip was shared on a fan page on Instagram and the person who made the sign commented underneath, revealing why she chose to make such an X-rated poster.

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"I got the reaction I wanted. She made me speechless the last time I was at her concert," they wrote.

"So it was my turn to make her speechless."

It comes after Chris Hemsworth's wife Elsa Pataky met Pink backstage after the pop star's Melbourne concert.

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Spanish-born Pataky, 47, shared photos and videos from the Funhouse singer's daring acrobatic gig at Marvel Stadium, and even got to meet the pop star herself backstage.

"Girls night to go and see @pink in concert. You are amazing @pink," she wrote, alongside a photo of everyone, with Pink seen in the middle.

"Thanks for making Molly feel so special on her birthday."

Attending the concert alongside her famous mum was Pataky and Hemsworth's eldest child, 11-year-old India Rose, and some of her friends.

Pink even spent some time with the group and brought out a cake for Molly, who was celebrating her birthday.

Pink has been touring Australia for the past few weeks as part of her 'Summer Carnival' stadium tour, which kicked off in Sydney on February 9.

It marks the first time she has toured Down Under in six years.

The US pop star is playing another show in Adelaide for one night only on February 27. She will then play in Perth, Sydney, Brisbane and Townsville in March.