Complex sentence: It was hosted by The Osbournes, With a number of guest stars, nominees, performers and presenters; the launch of the second AVMA (held at Acer Arena) was even more successful, with host Ashlee Simpson.
Split into simpler sentences: It was hosted by The Osbournes with a number of guest stars, nominees, performers and presenters. The launch of the second AVMA (held at Acer Arena) was hosted by Ashlee Simpson.