 Selena performed the song on her final performance on March 19 , 1995 during the Calle Ocho Festival in Miami , which attracted over 100 @,@ 000 fans . Selena was shot and killed by Yolanda Saldívar , her friend and former manager of the singer 's Selena Etc. clothing boutiques , on March 31 , 1995 . Selena 's performance of the song during her Houston Astrodome concert on February 26 , 1995 , was emulated by Jennifer Lopez as her role as the singer for the 1997 biopic film about Selena . " Si Una Vez " is considered by Billboard magazine to be one of Selena 's signature songs . Terra named " Si Una Vez " as one of Selena 's " most famous works " along with her other songs " El Chico del Apartamento 512 " , " Amor Prohibido " and " Fotos y Recuerdos " . The Broadcast Music , Inc . ( BMI ) recognized " Si Una Vez " at the BMI Pop Music Awards as Single of the Year in 1996 . 
