Adults: Skip this. The two major theatrical-to-DVD releases this week are for teen girls and kids under 10. For the teens, there's 'The Last Song,' which stars Miley Cyrus as a petulant musical prodigy who finds love and meaning on the beach; no, she's not a combination Joan Jett/Gidget, but a Nicolas Sparks heroine. Next up there's 'Furry Vengeance,' a live-action/CGI comedy that tried to be eco-friendly but ended up making few friends at the box office -- even among the kids it was aimed at. Read on.