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On Monday night, Justin Timberlake spent the last day of his Memorial Day weekend at the movies, but not with rumored ladylove Olivia Wilde, or his crush and co-star, Mila Kunis.

We caught the actor-musician leaving the ArcLight in Hollywood trying to be as incognito as can be wearing a baseball cap covered by his hoodie -- and accompanied by a mystery brunette.

Could he have really been on a date? Or was she just a friend of JT's? One thing we do know -- she is mostly likely not a friends with benefits of the Bad Teacher star.

Find out what Timberlake recently told Ellen about the concept of his upcoming movie Friends With Benefits on her show, after the jump.