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After entertaining Gleeks across the United States, Darren Criss and Dianna Agron crossed the pond to London for the European leg of their Glee Live! tour. The duo jammed inside the VIP tent at the Hard Rock Calling music festival before rejoining co-stars Cory Monteith, Lea Michele and Heather Morris to perform for their British fans. “Can’t believe the events that have happened in 24 hours. Last night, the Killers in Hyde park, today, playing two shows at the O2,” Agron Tweeted. Click through the gallery to see Heidi Klum, Kim Kardashian, Rosie Huntington-Whiteley and more stars at this weekend’s hottest parties! 

Jessica Simpson took home the Style Icon of the Year award at Us Weekly‘s annual Hot Hollywood party in L.A. last night, and she seemed pretty surprised by the win. “I’m not really that stylish, but I do know how to make a woman look beautiful, and when I want to look great, I know how to make it happen,” Simpson (in Etro) told reporters. She posed with Kathy Griffin (in Dolce & Gabbana) on the carpet, who told us, “I love Jessica Simpson! I’ve known her for a long time and she looks adorable.” Back in New York, Blake Lively showcased her newly-red locks, while Kelly Ripa and Mark Consuelos took in the Tribeca Film Festival. See more photos from last night’s hottest parties in the gallery!