The 34-year-old Finnish goaltender made 36 saves - including six saves in overtime - en route to earning third star honors in a 4-3 shootout loss to the Tampa Bay Lightning at the Bell Centre.
It marked the second straight outing in which Niemi was stellar in between the pipes after besting the New York Rangers on Thursday night with a 31-save effort on home turf.
That, of course, came just hours after the Canadiens revealed that starter Carey Price was sidelined indefinitely with a concussion.
Head coach Claude Julien wasn't at all surprised to see Niemi play his heart out against Jon Cooper's contingent in the Habs' final outing before Monday afternoon's trade deadline, noting that the 10-year NHL veteran has been a consummate workhorse since joining the group back in mid-November.
"Probably what you saw is what you see every day in practice - how he battles and how he competes - he does that every day. This wasn't something that wasn't natural for him. It was just what he does. Maybe he had a tough start this year, but he's won a Stanley Cup with Chicago and he's a good goaltender, and right now he's serving us really well," praised Julien. "We've got an injury to a really good goaltender and he stepped in and he's doing the job. It's been pretty impressive, for what he's gone through and he came here with a great attitude. Not only that, I think he's put a lot of enthusiasm in our group, because they love the way he competes, and that's contagious."