In what year was the album “Sin Rivales” released by Cheka?

In what year was the album “Sin Rivales” released by Cheka?: The album “Sin Rivales” was released in 2006 by Cheka, featuring 8 tracks.
What is the most successful song from the album “Sin Rivales” by Cheka?: “Por Ti” is the biggest hit from the album “Sin Rivales” by Cheka.

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