Complex sentence: In 2006, Newfield departed for a solo career, with Aubrey Collins taking her place on lead vocals; the group subssequently disbanded after she and Burns left in 2007 and 2008, respectively.
Split into simpler sentences: In 2006, Newfield departed for a solo career, with Aubrey Collins taking her place on lead vocals. The group subssequently disbanded after Collins and Burns left in 2007 and 2008, respectively.