Simplify the following text for a Grade 5 native English-speaking person.
Original: On September 18 , 2008 , Shinee 's `` Sanso Gateun Neo ( Love Like Oxygen ) '' was the # 1 song on M !
Simplified: On September 18 , 2008 , Shinee 's `` Sanso Gateun Neo ( Love Like Oxygen ) '' was the No. 1 song on M !