Complex sentence: On 19 March 2010 she sang for the Sports Relief Charity on BBC1 and she has performed for BBC Children in Need telethon three times thus far: on 19 November 2010; on18 November 2011, and on 16 November 2012.
Split into simpler sentences: On 19 March 2010 she sang for the Sports Relief charity on BBC1. She has performed for BBC Children in Need telethon three times thus far: on 19 November 2010; on18 November 2011, and on 16 November 2012.