And the truth is finally REVEALED!!!
[Image via Kylie Jenner/Instagram.]
The two were there for a week with about ten friends and family members, but the group mostly kept to themselves.
"Justin is a good snowboarder," claims a source. "He was on the slopes all the time, but Jessica didn't snowboard as often as he did."
After four years together, we have to give them some credit! Very cute.
[Image via WENN.]