Complex sentence: Preston, among many of Harrison's longtime friends, performed in the 2002 Concert for George at the Royal Albert Hall in London, to play a tribute song, and his performance there of "My Sweet Lord" has received critical acclaim.
Split into simpler sentences: Preston, among many of Harrison's longtime friends, performed in the 2002 Concert for George in London, to play a tribute song. Preston participated in the concert at the Royal Albert Hall, and his performance of "My Sweet Lord" has received critical acclaim.