Chris Kirkpatrick was saying “Bye Bye Bye” a lot while he was in *NSYNC.

The former boy band member exclusively told Page Six at a recent That’s4Entertainment ’90s Con that he was “probably” the biggest partier of the quintet, adding that both he and his bandmate Joey Fatone both shared the mantle for pulling practical jokes.

“If it’s playing pranks and that stuff, that’s me,” the 51-year-old told us. “If it’s partying, it was probably me. If it’s, you know, anything else, it was probably Joey.”

*NSYNC was for a brief time THE band of the ’90s, inspiring a rabid female fan basis.

Formed in 1995 by Kirkpatrick, *NSYNC was made up of Fatone, 46, Justin Timberlake, 42, JC Chasez, 46, and Lance Bass, 43. Hit singles like “It’s Gonna Be Me,” “I Want You Back” and “This I Promise You” followed along with memorable performances at the Super Bowl, World Series and the Olympic Games.

The group eventually disbanded in 2002, but not before completing five nationwide tours and selling over 70 million records, cementing their spot as one of the most popular boy bands in music history.

Kirkpatrick admits that there were more than a few concerts where he performed hungover but says his hangovers “weren’t that bad.”

“Like, if it was today, it would be a completely different story,” he explained. “But back then, they weren’t that bad, so there were a lot of different times where I was pretty hungover.”

The FuMan Skeeto clothing founder shares that he found himself with a vile hangover at a particularly inopportune moment.

“The worst was a photoshoot we did because I was really hungover and we went do the photo shoot and they’re like, ‘Oh yeah, so this is for all of our merch,'” he recalled. “And now everything that people bring in (for me to sign), I see the pictures from this and you can see I’m scruffy.

“And I’m just like, ‘Just take the picture. I feel like hell right now!'”

Kirkpatrick, who shares 5-year-old son Nash with wife Karlyn M. Skladany, says management never spoke to him about dangers on the road, such as sexually transmitted diseases.

“I was old enough,” he explained. “I was like 23, 24, 25, you know and that really wasn’t … they talked to us about not riding motorcycles, which I did anyways, not getting tattoos, which I did anyways, not having girlfriends, which I did anyways.”

“It was like, what they talked to us about was more for the image of the band,” the “Gone” singer added. “They weren’t concerned with if we had an STD or anything like that.”

Other celebs attending the ’90s Con three-day event last weekend included “Full House” stars Dave Coulier, Candace Cameron Bure and Jodie Sweetin; “Sabrina the Teenage Witch” alum Melissa Joan Hart; “Beverly Hills 90210” stars, Tori Spelling and Jennie Garth; and “Clueless” actress Alicia Silverstone.