Simplify the following text for a Grade 7 native English-speaking person.
Original: Rolling Stone magazine ranked Joplin number 46 on its list of the 100 Greatest Artists of All Time in 2004 , and number 28 on its 2008 list of 100 Greatest Singers of All Time .
Simplified: In 2004 , Rolling Stone magazine ranked Joplin # 46 on its list of the 100 Greatest Artists of All Time .