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Cruz Beckham showed off some rock-hard abs at his older brother’s birthday party the other day. Brooklyn Beckham celebrated his ninth birthday by taking in a movie along with his mother, brothers and Mel B’s daughter, Phoenix Chi, also nine years old. With his break-dancing performance under his belt, Cruz stepped out for the trip to the movies in a batman costume, effectively making himself the best-dressed attendee of the festivities.

After the movies, the brood was joined by supermodel Heidi Klum and “Desperate Housewives” star Eva Longoria at the Mexican restaurant Pink Taco. With David still in Shanghai with his soccer team, the L.A. Galaxy, he was unable to make the party.

Cruz, however, had to leave the party early after being beckoned with a tiny bat symbol in the sky and regrettably was forced to make a hasty exit to go fight some very mild crime.

Photos: Flynet Online

More photos of Victoria Beckham and her boys are after the jump.

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Photos: Flynet Online