Who starred alongside Cameron Diaz in the 2008 comedy film What Happens in Vegas?
Cameron Diaz: Cameron Michelle Diaz-Madden (born August 30, 1972) is an American actress, comedian, producer, former fashion model and author. Cameron Diaz:  Other high-profile films include "Charlie's Angels" (2000) and its sequel "" (2003), "The Sweetest Thing" (2002), "In Her Shoes" (2005), "The Holiday" (2006), "What Happens in Vegas" (2008), "My Sister's Keeper" (2009), "Knight and Day" (2010), "The Green Hornet" (2011), "Bad Teacher" (2011), "What to Expect When You're Expecting" (2012), "The Counselor" (2013), "The Other Woman", "Sex Tape", and " Annie" (all 2014). What Happens in Vegas: What Happens in Vegas is a 2008 American comedy film directed by Tom Vaughan, written by Dana Fox and starring Cameron Diaz and Ashton Kutcher. What Happens in Vegas:  The title is based on the Las Vegas marketing catchphrase "What happens in Vegas, stays in Vegas."
Ashton Kutcher