Norah Jones had better overcome her customary shyness. Come August, she'll be playing before audiences of 12,000 to 15,000 as she embarks on her biggest tour to date, Billboard reports. In support of her second album, ''Feels Like Home,'' which topped the charts for six weeks this spring and has sold 2.8 million copies in the U.S., the jazzy chanteuse plans a three-month trek of North American amphitheaters and arenas after she finishes her current European tour. Tickets for most dates go on sale this Friday, May 21; venue information is available at her website. The slate of 50-plus dates begins Aug. 14 in Antioch, Tenn. and runs through Nov. 14 in West Palm Beach, Fla. After all that, she'll really feel like home.