NEW YORK -- In Manchester, England, security is ramped up for Sunday night's all-star concert benefitting the victims of last month's terror bombing.

The attack at an Ariana Grande concert left 22 people dead and more than 100. Grande, Justin Bieber, Coldplay, and Katy Perry are all performing tomorrow at Manchester's Old Trafford cricket ground. Security is heightened not just there but at concerts around the world.

As crews set the stage for Sunday's concert in Manchester benefiting victims of last month's terror attack, social media is lighting up with photos of Ariana Grande paying a surprise visit to young fans injured in the blast.

"She was really, really good with them, really brilliant," said Adam Harrison, whose daughter eight-year-old Lily Harrison is recovering from a spinal wound.

Security has been ramped up at concerts in the U.S. after the Manchester bombing. CBS News

Harrison says the pop star made his daughter feel "like a rock star."

"As a parent, it just really, really made up for it. You do get goosebumps thinking about it," Harrison said.

The deadly suicide bombing at Grande's May 22nd performance is intensifying security concerns at concerts across the world.

In Germany, a terror threat shut down a music festival on Friday, sending thousands of fans home. The event resumed on Saturday, after a thorough sweep of the venue.

Concertgoers in the U.S. are also seeing stepped-up security.

Officials in Chicago say they're sending extra officers to Soldier Field, where U2 is performing this weekend. "Prepare to be checked twice before you get to the stadium," an official said.

They're also keeping watch from this 24-hour command center.

And in New York, hundreds of uniformed officers and private security personnel are monitoring Governor's Ball, a three-day music festival. Organizers say the Manchester attack factored into their planning.

"What that caused us to do is review everything and have more conversations about it all," cofounder Tom Russell said to CBS New York.

Billie Chaleff says after the Manchester bombing, she wouldn't let her 17-year-old daughter Emily come here alone.

"I just feel that with what's going on in this world, it's important to have a responsible parent to be with young adults," Chaleff said.

"At first, I was like, it's kind of, like, weird having my mom here but a lot of my friends' parents felt better knowing someone's mom is going to be here," Emily said.

People in New York have been told not to bring big backpacks or umbrellas, glass containers or picnic baskets. Music fans across the U.S. will be hearing similar advice as the summer concert season kicks off.