It had a scene in it where a girl went to baby sit her cousins and the room she slept in was decorated with clowns and there was a life size clown that was sitting in a rocking chair in the corner and she thought it was a doll but it was a man and he ended up killing her.

Amusement (2008)
From Wikipedia:After that, Tabitha goes into the guest bedroom upstairs and sees that the entire room is decorated with clown toys. One doll in particular scares her, a life-sized one sitting in the rocking chair. Her feeling of unease only intensifies as the television turns on without warning and the remote is in the clown's lap. She goes to bed, but the thunderstorm wakes her up.Still spooked by the clown, she turns around and faces her head away from it. Unbeknownst to her, the clown's head turns to see her. Later, the phone rings. Tabitha walks to answer, not knowing that the clown had been watching her all along. The caller is her aunt, checking on the children. Tabitha assures that every thing is fine and compliments her on her new house. She does express anxiety at the clown in her room. When her aunt asks which one, Tabitha says, "The one bigger than me." Behind her, the clown rises and walks towards her.


http://en.wikipedia.org/wiki/Amusement_(film)