Complex sentence: On 11 August 2009 Bat for Lashes performed on "Late Night with Jimmy Fallon" performing the song "Sleep Alone" she also performed "Moon and Moon" during the Mercury Award's 2009 event.
Split into simpler sentences: On 11 August 2009 Bat for Lashes performed on "Late Night with Jimmy Fallon" performing the song "Sleep Alone". She also performed "Moon and Moon" during the Mercury Award's 2009 event.