The 37-year-old singer is set to marry Vanessa Minnillo in the coming months but said that he is dreading his last night out as a single man because he has no idea what his friends have in store for him.
He told Parade.com, 'I'm fearful! But we're going to have a great time. At this point in life you don't get to see the boys as much as you used to and a lot of the friends from college and stuff have moved on and have their own families.
'This is a chance for us all to get together and tie one on and have some fun again. We're all looking forward to it.'
And the former 98 Degrees member said that if his fiancée plays her cards right, he might even sing to her on their big day.
'If she acts right, she might get a serenade! That's my trump card,' he said. 'Whenever I screw up and I need to get back to her good graces, I sing. So far it's worked.'