Complex sentence: Her debut album "Without Regret" was intended to be released on April 6,2010 through Vanguard Records, but according to her website and YouTube channel she has pushed the release date until July 2010 due to adding new songs onto the album.
Split into simpler sentences: Her debut album "Without Regret" was intended to be released on April 6,2010 through Vanguard Records. She then announced via website and YouTube channel that it was pushed back again until July 2010 due to adding new songs onto the album.