Ottawa snapped a three-game winning streak and fell to 8-1-1 since a Feb. 7 loss at Buffalo.
The Thrashers began the night with only six points in nine home games since a Jan. 16 victory over Los Angeles. But Belanger, who made it 1-0 in the first, forced a 2-2 tie early in the third with his 13th goal.
HURRICANES 3, PENGUINS 2
In Raleigh, N.C., Scott Walker scored two goals, Cam Ward had 22 saves and Carolina got a much-needed victory.
The loss spoiled a record-setting night for Pittsburgh second-year center Sidney Crosby, who became the youngest NHL player to reach 200 career points with a goal in the first period.
The Hurricanes moved in front of the Montreal Canadiens for the eighth and final playoff spot in the Eastern Conference.
SABRES 8, CANADIENS 5
In Buffalo, N.Y., Michael Ryan scored his first two goals of his NHL career, Thomas Vanek also had two goals, and Derek Roy had a goal and three assists to lead Buffalo to victory.
With the win, Buffalo took over the top spot in the league with 91 points, passing idle Nashville.
MAPLE LEAFS 4, DEVILS 3 (SO)
In East Rutherford, N.J., Yanic Perreault, Alex Steen and Jeff O'Neill scored in the shootout and Toronto denied Martin Brodeur his 40th win.
Andrew Raycroft preserved the win and helped Toronto snap a two-game losing streak by stopping Sergei Brylin on the Devils' fifth shootout attempt.
RED WINGS 6, BLACKHAWKS 2
In Detroit, Robert Lang had a goal and three assists, and Nicklas Lidstrom got his 200th goal and two assists to lead Detroit over Chicago.
BLUE JACKETS 3, STARS 2 (SO)
In Dallas, Fredrik Norrena stopped all three of Dallas' shootout attempts and Jason Chimera converted in the first round to lift Columbus.