'The Hunger Games' hunk Liam Hemsworth is making the most of his new Instagram account, posting snaps of everything from himself impersonating his dog to a cheeky snap of him without trousers on. Meanwhile TV producer Brad Falchuk has used social media to confirm his relationship with Gwyneth Paltrow, calling the actress his 'date' in a recent photo. And 'Harry Potter' star Daniel Radcliffe has chosen his Google+ account to unveil his dramatic new shaved-head look for the upcoming movie 'Imperium'.