Underwood hits the high notes at a country music festival in London. Plus: Zac Efron, the Garner-Afflecks, Fergie & Josh Duhamel and more

Sister Act

Pregnant Jessica Simpson – with daughter Maxwell, 10 months – keeps it all in the family on Saturday, stepping out with sister Ashlee and her son Bronx, 4, in Burbank, Calif.

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