Can't we all just get along? Adam Lambert is one of the many celebrities who got into a bar fight in 2011.

On Thursday, Lambert was arrested after getting into a fight with his boyfriend, Sauli Koskinen, at a gay bar in Finland.

According to the Hollywood Reporter, Lambert and Koskinen got into a scuffle outside of DTM (Don't Tell Mama) in Helsinki around 4 a.m. after a dispute, which ultimately led the couple to be arrested.

Reports said Lambert got physical with people trying to break up the fight and spent several hours in prison as police investigated four possible assault offenses.

On Thursday, after he was reportedly released from prison, Lambert tweeted an equation which pretty much sums up his night.

Jetlag+Vodka=blackout. Us÷blackout=irrational confusion. jail+guilt+press=lesson learned, he tweeted.

And in case you're wondering how the couple made out following the fight, Lambert tweeted, Sauli+Adam+hangover burgers=laughing bout it. :).

Big Brother star Koskinen also posted a comment about the incident on his personal blog, Publicity is not easy, but also celebrities are just human. Love is not easy either, but it lasts forever!

2011 was a fighting year for celebrities who visited drinking holes; Shia LeBeouf was in multiple scuffles, mostly instigated by himself, while others were innocent victims like Gavin DeGraw.

View the slideshow to see the 13 memorable celebrity bar fights in 2011.