Beauchemin fired a slap shot past goalie Viktor Fasth to give the Ducks their 50th win of the season (50-18-8). Perry and Ryan Getzlaf assisted on the deciding goal.
With the Ducks trailing 2-0, Perry scored his 40th goal just 37 seconds after Jordan Eberle doubled Edmonton's lead at 2:51. Perry then tied it with 8:35 left. It is the second time Perry has reached 40 goals in a season.
Rookie goalie Frederik Anderson (19-5) stopped 30 shots.
Philip Larsen scored his third of the season in the first period for Edmonton.
That was something I've been dreaming of, something I've told myself before the third period I was going to do ... It was an amazing feeling. It's hard to describe. I didn't believe it went in at first but when I saw all the reaction and all the fans going crazy and my teammates going crazy, it's just an unbelievable feeling. I didn't know what to do. I didn't know whether to jump or just skate and do a Theo Fleury. I don't think I'm the same caliber player he is so I couldn't do it.
— Flames forward Mikael Backlund on scoring the overtime winner against the Ducks in Gm. 3