Country music superstar Luke Bryan spent his birthday in Bangor on Sunday, bringing his Kill the Lights Tour to a packed Darling's Waterfront Pavilion.

About 14,000 country music fans crashed Bryan's 40th birthday party, which featured an onstage celebration the likes of which has never been seen in Bangor, and we're guessing anywhere else.

The festivities started even before Bryan took the stage with opening act Dustin Lynch delivering a seven-song set featuring his hits "Where It's At," "Hell of a Night," and his newest single "Seein' Red." Before his set was done, Lynch gave the crowd a hint of what was in store later in the show for Bryan's birthday.

"It's going to get weird," he said.

The weirdness started early. A double rainbow could be seen over the Penobscot River as Little Big Town took the stage, powering though a 14-song set including "Pontoon," "Day Drinking," Tornado" and crowd-favorite "Girl Crush," which drew deafening cheers from fans.

But it was Bryan's night.

From the opening song "Rain is a Good Thing," Bryan had the crowd on its feet and singing along to hits including "Drunk on You," Kiss Tomorrow Goodbye," "Play It Again," "Roller Coaster," and his current hit "Huntin', Fishin' and Lovin' Every Day."

About halfway through the set, Karen Fairchild of Little Big Town joined Bryan on stage for a rendition of "Home Alone Tonight," which was followed by onstage tequila shots with Little Big Town and a medley of Ed Sheeran's "Thinking Out Loud," and Marvin Gaye's "Let's Get It On."

But it was just before a performance of the Brooks and Dunn hit "Play Something Country" that the evening really turned into "the world's largest country music birthday party," (as Little Big Town promised earlier in the show.)

Lynch, Little Big Town, and about 20 band and crew members -- along with Bryan's wife, Caroline Boyer -- all took the stage, onto which was wheeled a giant cake (made by Cake Concoctions) with sparklers featuring a cutout of a shirtless Chippendale dancer with Bryan's head attached.

People dressed as ice cream cones or cupcakes showered the crowd with champagne as Lynch opened a giant cooler and passed out cans of beer to the cheering fans in the pit.

The Kill the Lights Tour now moves on to Scranton, Pa., but it's safe to say it will never have another stop like Bangor.

You can watch video of the birthday celebration below.