"Sometimes the game kinds of goes in waves like that," Spezza said. "We've seen it against us; when you're offensive players you get a few shifts in a row and you kind of get rolling a bit."
It was the ninth time this season the Canadiens gave up two goals in less than a minute.
"I don't know if I'm going to have to call a timeout after we get scored on," Montreal coach Claude Julien said. "It's just something that has got to get better. We need to be strong, and when you get scored on, the biggest thing you [have] to do is push back, and right now that's not happening."
Seguin scored into an empty net with 27 seconds remaining.
In the second period, Stars forward Gemel Smith cleared a loose puck out of the crease after a deflection by Andrew Shaw. In the third period, Montreal nearly tied the game, but defenseman Stephen Johns swept the puck off the goal line.
"Those guys do a good job of helping me out when I need it," Bishop said.