The expectant singer enjoys a day in the park with son Kingston. Plus: Ashlee & Pete, Lindsay Lohan, the Jonas Brothers and more

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BROTHERS GRIM

Sunglasses can't camouflage the serious-looking Jonas Brothers – (from left) Nick, Joe and Kevin – as they take their sibling act to the L.A. streets on Wednesday. Later that night, the trio rocked the house at the American Idol season finale.