Compete at the Camp Nou on Sunday (2/19/2012), Barca first left after Pablo Piatti goalkeeper Victor Valdes at the beginning of the game.
However, Barca do not panic. They reacted and responded with two goals from Messi in the first half.
In the second half, Messi scored two additional goals. A goal from Xavi Hernandez goal feast finally close the Catalans.
This victory makes Barca Barca add to the collection points to 51 points from 23 matches. They remain second in the standings, 10 points adrift of Real Madrid. Valencia in third with 40 points.
The visitors stole a goal in the ninth minute. Sofiane Feghouli Exploiting cross from the right wing, Piatti cleverly cheated the ball without being able to be driven by Valdes.
Three minutes later, Barca had a chance to level the score. But Pedro was shot right leads into the arms of Diego Alves.
Position at the end is really strong in the 22nd minute. Starting from Adil Rami mistake in cutting the ball, Messi managed to use it and the Valencia goalkeeper from a narrow angle.
Five minutes later, Barca had turned 2-1 ahead. The first flick Messi welcomes Eric Abidal's cross from Alves irresistible. But, the ball rebounded back and Messi struck again broken the Valencia goal.
After the second goal Messi, Barca had two good chances in quick succession because of Alexis Sanchez and Cesc Fabregas faced with Alves. But, shot two of them can still be countered by the goalkeeper.
Entering the 40th minute, Fabregas returned to terrorize the Valencia goal. He welcomes feedback Andres Iniesta with an overhead kick, but the ball still hit the crossbar.
Until halftime, the score was 2-1 to Barca's advantage.
The second half has not gone a minute, Alves has been forced to work hard. He blocked a hard shot from inside the penalty box Sanchez.
Messi almost made a hat-trick in the 60th minute. But, Alves was again made to thwart a header brilliant rescue.
Valencia is not without opportunities. They had threatened to kick Feghouli first time. However, Vales showed excellent reflexes and block the ball.
Messi finally fulfills his hat-trick in the 76th minute. The world's best player grabbed the ball threw up the blocked kick Cristian Tello Alves.
Five minutes before the end of normal time, Messi, Alves was again forced to its knees. After receiving feedback breakthrough Sergio Busquets, he ran into the penalty box and then to chip the ball over the head of Alves.
At the time of injury time, Barca's Xavi scored perfect party. He was to lob the ball in the penalty box can be stopped by Valencia without Alves.
Barcelona: Valdes; Montoya, Pique, Puyol, Abidal; Sergio Busquets, Fabregas (Thiago 77 '), Iniesta (Xavi 86'); Alexis, Messi, Pedro (Tello 68 ')
Valencia: Diego Alves; Miguel (Ricardo Costa 25 '), Rami, Victor Ruiz, Mathieu; Albelda, Tino Costa (Topal 82'); Feghouli, Jonas, Piatti (Jordi Alba 66 '); Soldado