Adam Lambert

Back in the US of A

12/26/2011 7:00 AM PST BY TMZ STAFF

Adam Lambert and his Finnish reality star boyfriend Sauli Koskinen returned to the States in time for Christmas yesterday ... just a few days after the pair was arrested in Finland for fist-fighting each other outside a gay bar.

Lambert and Koskinen weren't chatty -- but the warm and cuddly Xmas pic they posted on Twitter yesterday seemed to suggest things were now just ducky.

The pair was arrested after the fight and blamed the incident on alcohol