Ringo Starr, Chaka Khan, Lenny Kravitz

Music expert Keith Caulfield answers readers' questions about Ringo Starr's album sales, Chaka Khan's "Funk This" and Lenny Kravitz' soundscan numbers.

Music expert Keith Caulfield answers readers' questions about Ringo Starr's album sales, Chaka Khan's "Funk This" and Lenny Kravitz' soundscan numbers.