Complex sentence: In late 2009 they announced their self-titled album and released it on June 8,2010 and peaked at number 26 on the Billboard 200, selling more than 15,000 copies in its first week.
Split into simpler sentences: In late 2009, they announced their self-titled album and released it on June 8,2010. It peaked at number 26 on the Billboard 200, selling more than 15,000 copies in its first week.