KTUphoria 2015 offered a star-studded kickoff to summer at Nikon at Jones Beach Theater Sunday night, but the weather didn't quite cooperate.

Thunderstorms prevented headliner Pitbull from landing in New York, while the capacity crowd dodged raindrops and braved the strong winds.

There was plenty of booing after Jason Derulo announced Pitbull's cancellation during his own set, and many began heading to the exits. Nonetheless, the four-hour-plus extravaganza was an overwhelmingly good time.

The show's most memorable moment was not related to the weather, though. Kelly Clarkson accidentally threw her microphone into the audience during her hit "Since U Been Gone," when it came loose from her mic stand.

"That's never happened to me before," Clarkson said, laughing. After she got a replacement mic, she even changed the lyrics to "My mic is gone."

"Top that, rest of the acts!" she joked, though her sleek half-hour set, featuring material from her recent "Piece by Piece" album, would have been tough to beat in any case.

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That didn't mean the other acts weren't going to try.

Valley Stream's Shaggy got the crowd excited with a mix of his smash hits like "It Wasn't Me" and "Angel" and new material like the single "I Need Your Love."

"Ain't no party like a party at Jones Beach," Shaggy said. "It's good to see you again, Long Island."

Pitbull's cancellation allowed Shaggy and Ricky Martin to extend their sets. And Martin went all-out in his, aided by eight dancers and a nine-piece band powering his high-energy mix of Latin pop and dance music.

Adam Lambert offered fans a sneak preview of his upcoming album, including new hit "Ghost Town" and the album track "Evil in the Night."

Part of KTU/103.5-FM's charm as a radio station is the way it brings together different cultures under the umbrella of dance music. And KTUphoria reflected that, with Spanglish sets from Martin and Latin heartthrob Prince Royce, as well as R&B from Derulo and throwback soul from newcomer Justin Baron.