Madonna's adorable son Rocco Ritchie joined his mom on stage to help her kick off her MDNA world tour in Tel Aviv, Israel, on Thursday. Check out his multiple costumes — including a priest's robe! Plus, Charlize Theron shows off her chic style in London, and we're taking a look at some of the best celeb Twitpics of the week. Let us know on Facebook or Twitter which are your favorites — and why!
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