The Blues added a power-play goal by Alexander Steen and an empty-netter by T.J. Oshie in the final 3:15. It was Allen's fifth career shutout.
Tarasenko skated down the slot and fired a shot past Kari Lehtonen into the lower right corner 3:33 into the third. It was Tarasenko's second game-winning goal in Dallas this season.
Steen and Oshie each had a goal and an assist, and teammate Alex Pietrangelo had two assists. St. Louis killed all six Stars power plays. The Blues' penalty killers have been successful in 29 of 30 chances over the last nine games.
Stay Connected
NHL.TV™
NHL GameCenter LIVE™ is now NHL.TV™.
Watch out-of-market games and replays with an all new redesigned media player, mobile and connected device apps.
Introducing the new official NHL App, available for iPhone, iPad and Android smartphones and tablets. A host of new features and improved functionality are available across all platforms, including a redesigned league-wide scoreboard, expanded news coverage, searchable video highlights, individual team experiences* and more. The new NHL App on your tablet also introduces new offerings such as 60fps video, Multitasking** and Picture-in-Picture.
*Available only for smartphones
** Available only for suported iPads