Complex sentence: Barry Manilow's 1974 "Mandy" was a cover of a song originally titled "Brandy" by Scott English; however, Manilow changed the title following the success of the Looking Glass single, so as not to get the two songs confused.
Split into simpler sentences: Barry Manilow's 1974 "Mandy" was a cover of a song originally titled "Brandy". However, Manilow changed the title following the success of the Looking Glass single, so as not to get the two songs confused.