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Rosario Dawson and Thandie Newton posed cheek-to-cheek at at the after party for A Memory, A Monologue, A Rant, and a Prayer in London. Both actresses participated in the one-off charity show, which raised money for Women for Women International, V-Day, and Domestic Violence Intervention Project. “‘A Memory, A Monologue, A Rant And A Prayer’ in London’s Evening Standard. Tickets sales will be triple matched!” Dawson tweeted. Click through to gallery to see more stars at last night’s hottest parties.

Glee’s Naya Rivera (in Moschino) and Cory Monteith hosted the 23rd annual GLAAD Media Awards in New York City, honoring performers, TV shows, newspapers and films for their fair and accurate depictions of the lesbian, gay, bisexual and transgender community. “Back home to LA! It was great to get a little taste of NY and thanks again to the @glaad awards for letting me and @CoryMonteith host!” Rivera tweeted. Click through the gallery to see Madonna, Brooklyn Decker and more stars at last weekend’s hottest events.

House of Lies star Kristen Bell (in Reem Acra) and The Help‘s Ahna O’Reilly represented spring’s hot color trend in bright candy-colored looks at the Alzheimer’s Association’s A Night at Sardi’s event in Beverly Hills, which celebrated the organization’s 20th anniversary. Click through the gallery to see Christina Hendricks, Malin Akerman and more stars at last night’s hottest events.

Troian Bellisario, Lucy Hale (in Rebecca Minkoff) and Shay Mitchell, the stars of ABC Family’s Pretty Little Liars, teamed up on ‘A Day’ at the 2012 ABC Family Upfront presentation held at the Mandarin Oriental Hotel in New York City. During last night’s episode, the show revealed its notorious mystery character, A. “#PrettyLittleLiars has the BEST fans ever. EVER. So proud to be a part of this amazing family,” Tweeted Mitchell after the game-changing episode. Click through the gallery to see more stars at last night’s hottest events.