Jude Law, wearing a not so sexy tight cap-sleeve t-shirt, did a rockin rendition of Chuck Berry’s classic Johnny B. Goode.  The 37-year-old British actor riled up the crowd with his rock star karoke performance at a Czech Republic night club.

Jude was in the Czech Republic for the Karlovy Vary Film Festival, where he was honored with the President’s prize at the festival this year for his work on the silver screen.

What do you think of his performance?  What about his t-shirt??