Lutz plays Mr. Big Shot Down Under. Plus: Lily Collins, Gwen & Kingston, Rihanna and more
Updated: Monday Apr 02, 2012 | 05:00 PM EDT
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Gwen Stefani goes from jet set to swing set with her boys Kingston, 5, and Zuma, 3, (not pictured) at a Brentwood, Calif., park on Saturday.
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