LOS ANGELES -- If you know nothing about Metallica, "Enter Sandman" does sound like it could be the title of a lullaby. A company called Baby Rock Records has created lullaby versions of songs by Metallica, Coldplay and Radiohead. Executive producer Valerie Aiello said her company did the lullaby tributes because they love the music of all those artists. She said they tested the CDs on babies they knew and she can vouch that one crying baby fell asleep while listening to the Coldplay disc. The Metallica, Coldplay and Radiohead versions come out Tuesday. Future editions will feature lullaby versions...