Simplify the following text for a Grade 6 native English-speaking person.
Original: Rolling Stones Barry Walters gave the song a positive review stating '' `` Rolling in the Deep '' finds the 22-year-old in bluesy gospel mode , sounding powerful but not particularly pop .
Simplified: Rolling Stones Barry Walters gave `` Rolling in the Deep '' a positive review . He said Adele 's voice was `` powerful but not particularly pop '' in the song .