Ever wonder what pop's biggest stars would look like with a Skrillex 'do? So do we.

• Rihanna: Oh, Ri-Ri, we love the way your hair lies with this 'do.

Even Nicki Minaj will buy her own tour merchandise -- when it's legitimate.

On Thursday (Aug. 6), the rapper was driving when she saw a man on the side of the road selling knock-off T-shirts from her Pinkprint Tour. She caught the entire conversation on video and posted it to her Instagram.

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 "Can I have a shirt?" Minaj asks the man.

Can I have a shirt? . When u drive past a person selling your stolen t-shirts on the highway. #ThePinkprintTOUR

A video posted by Nicki Minaj (@nickiminaj) on Aug 6, 2015 at 3:47pm PDT

He then pulls out his phone to document the moment, while screaming girls drive past in cars. "Where did you get that shirt, sir?" the rapper asks, but she laughs as more crying girls pass.

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Minaj also posted pictures of her visiting the Children's Hospital of Philadelphia with Ryan Seacrest Studios. She met with fans at the hospital and posed for pictures.

Visited The Children's Hospital of Philadelphia today with Ryan Seacrest Studios. If you need something to do in your spare time, try this. I left feeling so inspired by these incredibly strong, beautiful, dynamic children. Pray for them, you guys. They would've melted your heart.

A photo posted by Nicki Minaj (@nickiminaj) on Aug 6, 2015 at 4:21pm PDT

Following Justin Bieber's canceling his Aug. 28 set at the Fusion Festival in Birmingham, England, earlier this week, Ed Sheeran is stepping in as a replacement. 

Sheeran announced the news on Twitter Thursday, "I know I said Wembley was my last UK show of this tour but my mate had a cancellation on his festival so I'm filling in last minute." The concert benefits the Prince's Trust youth charity. 

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Festival organizer, Mike Owen, told the BBC that Sheeran's setting up to fill in for Bieber's headlining set on the first night of the three-day festival nearly brought him to tears. 

"I've been in this business a long time and it nearly brought me to tears," he said. "It was just a moment of sheer excitement... The most-streamed artist in the world last year and he's going to come and do Fusion in Birmingham."

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Upon his cancelation, Bieber apologized to his U.K., fans and promised to make it up to them. He said, "I look forward to the opportunity to give my U.K. beliebers a great show in the future."

The festival organizer Owen said they had a lot of concerns over the past couple days but through a number of phone calls, "Sheeran himself kind of came forward out of a little group of conversations with people and said, 'I'll do it.'"

Owen added, "It was absolutely breathtaking for us. It was just astonishing. What a wonderful man."

I know I said Wembley was my last UK show of this tour but my mate had a cancellation on his festival so I'm filling in last minute

It's called Fusion fest, it's in Birmingham, and it's on the 28th of August, this is the last booked UK show of the X tour. No more after

Tickets are still available online, see you there x

Tickets are here, grab them quick http://t.co/3OxfL8w62O