LOS ANGELES (Reuters) - John Mayer, in a week of slow sales, notched his second week at the top of the Billboard 200 album chart with his album "Born and Raised." Mayer's album, his fifth done in a studio, sold 65,000 copies to keep the top spot, the first time the American singer has held the top position for more than one week. British singer Adele's "21," which sold 58,000 copies, retained the No. 2 spot, boosted by NBC television's "Adele: Live In London" special, which aired over the weekend. ...