Miley Cyrus and Jennifer Hudson celebrated Pharrell Williams's 40th birthday in Miami on Friday night. Miley bared her belly in a black crop top and baggy leather shorts as she mingled with the star-studded crowd. She and Pharrell have become close friends after he started collaborating with her on her upcoming album. Miley hasn't confirmed when the new record will come out, but she did give fans a taste of her new sound last week when she and Snoop Dogg released a new single together titled "Ashtrays and Heartbreaks." She has been spending the weekend in Miami and was spotted smoking a cigarette with a male friend on a hotel balcony on Saturday.