K-Fed's Babysitting Duties - It's a Hard Rock Life

6/19/2009 8:13 AM PDT BY TMZ STAFF
Babysitter-of-the-year Kevin Federline blew some of the $30K Britney's paying him to watch the kids this month on a quality dinner in London last night -- at the local Hard Rock Cafe.

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Federline rolled into the joint with the bodyguard seen in the photo -- plus his GF and a personal nanny to help with little Sean Preston and Jayden James.

It's great to see K-Fed finally holding down a job.