American Express Co. launched an ad campaign from WPP Group's Ogilvy & Mather
, New York, to effort promote Blue Cash, a cash-rebate program tied to the Blue card. The effort includes a promotion that will feature a free concert by Sting at Chicago's Grant Park Oct. 7. Art director: Carol Dronsfeld. Copywriter: Eric Aronin. See the spot at AdAge.com QwikFIND aap00g.