Simplify the following text for a Grade 7 native English-speaking person.
Original: Numerous well-known singers were influenced by his music , including Bing Crosby Judy Garland , rock and country entertainer Jerry Lee Lewis , and Bob Dylan , who once referred to him as `` somebody whose life I can feel '' .
Simplified: Some of these singers were Bing Crosby Judy Garland , rock and country entertainer Jerry Lee Lewis , and Bob Dylan . Dylan said Jolson was `` somebody whose life I can feel '' .