[[Fil:CameronDiazJune09.jpg|thumb|Diaz ved ceremonien hvor hun får hendes stjerne på [[Hollywood Walk of Fame]] i juni 2009.]]
Diaz' eneste film i 2007 blev ''[[Shrek the Third]]'', den tredje film i rækken om trolden Shrek, hvor også [[Justin Timberlake]] lagde stemme til en mindre rolle. Selvom filmen fik noget blandede anmeldelser,<ref>{{cite web |url=https://www.rottentomatoes.com/m/shrek_the_third/ |title=Shrek the Third - Movie Reviews, Trailers, Pictures |website=Rotten Tomatoes |access-date=8. juli 2012}}</ref> indtjente den $798 millioner på verdensplan.<ref>{{cite web |url=https://boxofficemojo.com/showdowns/chart/?id=shrekvs.htm |title='Shrek' Vs. Himself |work=[[Box Office Mojo]] |archive-url=https://archive.today/20120629113935/http://boxofficemojo.com/showdowns/chart/?id=shrekvs.htm |archive-date=29. juni 2012 |access-date=3. maj 2014 |url-status=live |df=mdy-all }}</ref> Samme år lagde Diaz også stemme til Princess Fiona i en 30-minutters julefilm, instrueret af [[Gary Trousdale]].<ref>{{cite news |title=Shrek the Halls Airs November 28 on ABC |url=https://www.comingsoon.net/news/movienews.php?id=38878 |archive-url=https://archive.today/20120729013127/http://www.comingsoon.net/news/movienews.php?id=38878 |archive-date=29. juli 2012 |newspaper=[[ComingSoon.net]]|date=29. oktober 2007 |access-date=3. maj 2014 |url-status=live |df=mdy-all}}</ref> Diaz indtjente anslået $50 millioner for hendes stemmerolle i ''Shrek''-filmserien og hendes næste film ''[[What Happens in Vegas]]'' overfor [[Ashton Kutcher]].<ref name="Forbes">{{cite news |last=Rose |first=Lacy |title=Hollywood's Top-Earning Actresses |url=https://www.forbes.com/2008/08/07/diaz-knightly-aniston-biz-media-cx_lr_0811actresses.html |work=[[Forbes|Forbes Magazine]] |date=7. august 2008 |archive-url=https://archive.today/20120530061010/http://www.forbes.com/2008/08/07/diaz-knightly-aniston-biz-media-cx_lr_0811actresses.html |archive-date=30. maj 2012 |access-date=25. august 2017 |url-status=live |df=mdy-all }}</ref><ref>[http://www.news.com.au/adelaidenow/story/0,22606,24069672-5006343,00.html "Only women to make it into top earners."] {{Webarchive|url=https://web.archive.org/web/20080829162543/http://www.news.com.au/adelaidenow/story/0,22606,24069672-5006343,00.html |date=29. august 2008 }} ''Adelaide Now''</ref> I den romantiske komedie af [[Tom Vaughan (director)|Tom Vaughan]], spiller Diaz og Kutcher to fremmede som vågner op sammen og indser, at de i fuldskab giftede sig i Las Vegas efter de havde vundet jackpot på et kasino. Anmeldelserne var overvejende dårlige, men filmen hentede alligevel $219 millioner ind efter et budget på $35 millioner.<ref>{{cite web |url= https://www.boxofficemojo.com/movies/?id=whathappensinvegas.htm |title=What Happens in Vegas (2008) |website=[[Box Office Mojo]]}}</ref><ref>{{cite web |url = https://www.rottentomatoes.com/m/10008760-what_happens_in_vegas |title = What Happens in Vegas |work=[[Rotten Tomatoes]] |access-date = 20. oktober 2018 }}</ref>
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