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X17 can report, exclusively, that Britney went to Kevin Federline's house tonight, just hours ago. It's not all blonde wigs and puppy dogs any more, people ...

Britney went, with her assistant, to Kevin's San Fernando Valley house, buzzed the intercom, and got no answer. She went around the block, came back, rang again, no answer. She tried a third time -- no reply from Kevin. Britney then took her anger out on our photographers, grabbing an umbrella and hitting their car, yelling.

We'll have more of these pictures (in addition to the above) and the video for you in the coming days ...

Meanwhile, here's our video of Britney this afternoon as she went to an office in Beverly Hills (after visiting her attorney) and then to her assistant's apartment building in West Hollywood.