There's another A-List Hollywood couple moving to splitsville. Guys, get ready to breathe a collective sigh of relief. Rachel McAdams is single again. The actress has decided to end her relationship with fellow actor Michael Sheen. The two met while filming a movie, but didn't become involved until after they wrapped. They finally went public with their relationship in October of 2010. Prior to dating Michael, we all remember Rachel was involved with actor Ryan Gosling. Those of us The Notebook fans still believe... especially now!