Rachel McAdams

A lot of actresses dye their hair. Cameron Diaz comes to mind.

Typically, however, we're looking at a blonde going brunette. Or vice versa. It's a rare case when a beautiful brown-haired star trades in her dark locks for ... pink. But Rachel McAdams has dared to go where few others ever have.

Now that she's (possibly) engaged to Ryan Gosling, perhaps the Wedding Crashers actress simply doesn't care about her looks anymore. Or perhaps she's aware that a face like that goes with any hair color.

Either way, we're on the McAdams bandwagon. She's everything that Anna Nicole Smith is not.

They were everyone's favorite fake couple in The Notebook.

Then, Rachel McAdams and Ryan Gosling got together in real life.

Then, they broke up. Now, they're reportedly an engaged couple again.

It's enough to make Jude Law and Sienna Miller look normal. Almost.

An insider tells Life & Style the couple are finally re-engaged and back to making long-term plans together after a "touchy" reconciliation period, during which neither was sure of their decision.

"Ryan didn't have to repropose," says the insider. "He and Rachel just agreed it was time to think about getting married again because they had worked out their problems.

Ryan says he's thrilled that Rachel is wearing her engagement ring again, which Ryan gave her early in 2005.

It was always a secret engagement, and they will never confirm it publicly, but it's back on, and they're happy again, planning some family vacations together and doing the private-party rounds to support Ryan's role in Half Nelson."

Shockingly, the pair won't be following in the insane, public footsteps of Tom Cruise and Katie Holmes.

"Ryan says they're looking for a good time to slip away and do it," says the insider, "and he's even said New Year's might be the perfect time for him and Rachel to make things permanent."

Sounds exciting! We just hope Britney Spears and Jonathan Rotem are next in line. It's about time she settled down again.

It's the latest celebrity craze: confused couples.

Seriously, are you with Tony Parker or not, Eva Longoria? That picture says you are, but the thought bubble we made up says you're still pining for Mario Lopez.

Then there's Jennifer Aniston and Vince Vaughn. Vinnifer/Vaughniston can't settle on a nickname, let alone a stable relationship.

Now, it appears as though young love birds Rachel McAdams and Ryan Gosling are back together. Maybe. The Notebook costars reportedly broke up this summer, but the native Canadians looked very much the happy couple on Sunday in Toronto, taking their dog to the park and each other's tongues to town.

Gosling was in town shooting scenes for his new film, Lars and the Real Girl. The 25-year-old actor is receiving high praise for his latest performance as an idealistic teacher struggling with drug addiction in Half Nelson.

McAdams, meanwhile, is gorgeous. A dream boat. Someone who could give Scarlett Johansson a serious run for her sexy money.

She also recently finished shooting Marriage, a 1940s era drama about an adulterous man who plots to kill his wife to spare her the humiliation of a divorce.