Lady Gaga and Yoko Ono shared a hug, Nick Jonas went on a health kick with Michelle Obama, Sir Paul McCartney snapped a pic with his mobile device, Rihanna hit the racks, Adam Lambert planted one on a friend, Kanye West and model Selita Ebanks held hands, Drake and Trey Songz smiled for the paps, Bruno Mars got techy and Katy Perry dressed conservative... sorta. It all happened this week and we've got the pics to prove it.
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