Smith and Kidd hit consecutive 3-pointers to give the Knicks a 100-95 lead with a minute left in the game.
NETS 102, CELTICS 97
Johnson finished with 19 points and eight rebounds for the Nets in front of a sold-out crowd of 17,732.
Pierce scored 22 points and Leandro Barbosa had 17 in place of Rondo, who was out with a sprained right ankle. Kevin Garnett added 14 points but Boston had its three-game win streak snapped and lost to the Nets for just the third time in 21 meetings.
Copyright 2012 by The Associated Press
This story is from ESPN.com's automated news wire. Wire index
MORE NBA HEADLINES
- Jackson's book trumpets Jordan over Kobe
- Mayor says deal to sell Kings has been signed
- Spurs KO Warriors, head to West finals
- Carmelo, Knicks down Pacers to stay alive