CDIAZ080207_01.jpgCameron Diaz CDIAZ080407_04.jpgCameron Diaz has always seemed like one of the more grounded stars walking around - but might she be taking a cue from Paris? Yesterday, our photogs spotted her out twice, and we noticed that the screen star made a point of changing her outfit midday, switching from blue-jean culottes to a stylish black dress! Could Cameron simply be embracing her celebrity at long last? Or, with former flame Justin Timberlake's relationship with Jessica Biel all over the papers, might she be taking any opportunity to win back the spotlight?