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Meryl Streep and Jennifer Hudson (in Reem Acra) stayed close at a Revlon concert benefiting the The Rainforest Fund in New York City. The happy ladies were among the list of entertainers for the evening, which also included Elton John, Bruno Mars and Sting. See which other mega-stars else made an appearance at the auction, and check out more from last night’s hottest events in the gallery.