I loved it - IG thought I was mad....
Described as "the most original and stunning sequence in an original and stunning film", Rebekah del Rio's Spanish a cappella rendition of "Crying", named "Llorando", is praised as "show-stopping ...except that there's no show to stop" in the sparsely attended Club Silencio. Lynch wanted to use Roy Orbison's version of "Crying" in Blue Velvet, but changed his mind when he heard Orbison's "In Dreams". Del Rio, who popularized the Spanish version and who received her first recording contract on the basis of the song, stated that Lynch flew to Nashville where she was living, and she sang the song for him once and did not know he was recording her. Lynch wrote a part for her in the film and used the version she sang for him in Nashville. In the Club Silencio scene, before the song ends, del Rio collapses onstage although her powerful voice continues to ring throughout the theater. The song tragically serenades the lovers Betty and Rita, who sit spellbound and weeping, moments before their relationship disappears and is replaced by Diane and Camilla's dysfunction. According to one film scholar, the song and the entire theater scene marks the disintegration of Betty's and Rita's personalities, as well as their relationship. With the use of multiple languages and a song to portray such primal emotions, one film analyst states that Lynch exhibits his distrust of intellectual discourse and chooses to make sense through images and sounds.
Whether or not Lynch pretends to know what he's created, read between the lines. This is the scene where Betty/Diane's soul is taken and she understands - after she's already dead - how she's betrayed "Rita." The scenes following Club Silencio reveal the reality of Betty/Diane's homicide, suicide and other choices. dougeski- Youtube
I love David Lynch even if he doesn't understand himself :)