Wait 'til you see Lady Gaga's outfit from the YouTube Music Awards! It's the most terrifying Halloween costume we've ever seen, problem is-- it's not a costume! In typical Gaga fashion the singer rocked grillz for the award show! Nicole Richie was perfection at the LACMA Gala in a sheer gown. She posed with Kate Hudson who also looked amazing at the event. Selma Hayek and a newly preggo Olivia Wilde were also at the soiree and looking fab, as was Zoe Saldana who flashed some skin! Camilla Belle showed off a new edgier hairstyle with a messy bob and bangs!