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5 things people are talking about this week...

1EXPLOSIVE Actor Jim Carrey (48) is a grandad. His 22-year-old daughter Jane gave birth to a baby boy, Jackson Riley Santana. Grandad twittered "This is what 7lbs 11oz of California dynomite [sic] looks like!"

2AGREE TO DISAGREE Ryan Phillippe and Abbie Cornish have split but can't agree on who did the breaking up. Cornish's rep got in first telling People magazine that Abbie did the dumping but Philippe's rep said Ryan did the ditching.

3PRE-HAB Charlie Sheen's chaotic life continues to make headlines. The actor checked himself into rehab as a 'preventative measure' according to his publicist. Sheen still has to face assault charges relating to an incident involving his wife Brooke Mueller.

4GET . . . Lost star Matthew Fox is the latest celeb to be at the centre of infidelity rumours, but the actor, who has been married for 18 years, has denied reports that he had a fling with a 25-year-old stripper Stefani Talbot.

5Sweetner Former Sugababe Keisha Buchanan is reportedly suing the group's current members in an attempt to stop them using the name.