Kate Beckinsale, 49, slips into a skin-tight latex mini dress for Demi Lovato's 30th birthday bash

Idris Elba runs into big cat trouble... again: KATE MUIR reviews Beast

Demi Lovato celebrates 30th birthday with Jute$ and celebrity pals Paris Hilton and Kristen Stewart

Demi Lovato Poses With ‘My Best Friend’ Boyfriend Jutes at 30th Birthday Party: See Photos