【How-to】How long should a 7 year old practice piano

Beethoven, Sufjan Stevens, Radiohead, Counting Crows, Bob Dylan and U2 rank highest among so-called smart people, while Lil Wayne, Beyonce, the Used, and T.I. come in near the bottom of the spectrum. Acts like the Beatles, Maroon 5, Kanye West, and OutKast fall somewhere in the middle.