Beyonce Knowles Kicks Off "I AM..." Tour

Kick-starting her world tour, Beyonce Knowles took the stage on Monday night (April 27) at Zagreb Arena in Zagreb, Croatia.

The "Obsessed" starlet rocked out with an energetic performance, now ready to take her "I AM...." tour throughout Europe before heading to the States in late June.

Aside from her music endeavors, Miss Knowles is also riding high off of the performance of her new movie, "Obsessed".

The Sony Screen Gems' suspense film topped the box office over its first weekend - raking in an estimated $28.5 million.

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Enjoy the pictures of Beyonce Knowles performing in Zagreb (April 27).