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Sparks are indeed still flying between Katy Perry and John Mayer.

The Hollywood couple headed to Chicago this Fourth of July weekend. And being two music superstars, the pair couldn't help but celebrate the festive holiday at a rocking concert.

The twosome was spotted getting cozy at the Grateful Dead farewell concert series Saturday night where they listened to tunes from the floor section.

Mayer wore denim jeans and a blue sweater while Perry opted for a fedora, gray sweater and blue bandana placed around her neck. Yes, it's quite the different look from what the two wore on the Fourth of July two years ago. Never forget the "broad stripes and bright stars."

Back in May, E! News exclusively confirmed Perry and Mayer were indeed back together. In fact, their visit to the Disneyland Resort in Anaheim, Calif., further proved that these two were so on.

According to onlookers, the group enjoyed hanging out in the park so much that they didn't leave until closing time—around midnight!

The pair was also acting very cozy when they enjoyed a romantic meal at Los Angeles hot spot Ysabel in early April.

"They never stopped talking and being friendly while they were broken up," a source revealed to E! News. "They are really excited about being together right now and spending as much time as possible."