His shock outburst comes just days after Britney signed a mega-bucks deal to return to the entertainment capital.
Speaking to British presenter Zane Lowe on Beats 1 Radio, Justin was asked if he’s ever consider a Vegas residency.
"I mean I wouldn't rule it out if it was something that was different. I definitely don't, you know, it feels like…" Justin started.
"Like a retirement option?" Zane interjected, before Justin agreed.
"You're planning your retirement. You know what I mean? So for some reason that feels like scary to me."
Britney held a record-breaking residency at the Planet Hollywood resort in Las Vegas with her Piece of Me show.
The show ran for four years and came to a close on New Year's Eve , however the 36 year old popstar has reportedly signed up for a second run, rumoured to be starting in 2019.
“They made the offer and she just couldn’t refuse. She loves Vegas!” a source told US Weekly.
Justin, 36 is set to perform at the he Super Bowl later this year after recently launching a comeback with new track Filthy.