You can finally add Olay to the list of skin care brands that count on star power to propel product sales. The Procter & Gamble-owned brand said during a press conference at Rockefeller Center’s Top of the Rock Wednesday morning that ountry music star Carrie Underwood would appear in an ad campaign breaking in November. The TV, print, digital and in-store effort is meant to target a younger woman who is past her teens but not yet ready for antiaging products, according to executives...