05/08/2013 11:00 BST

Lindsay Lohan On Top Form As Guest Host Of 'Chelsea Lately', Cracks Joke About Harry Styles' Sex Life (VIDEO)

Lindsay Lohan is all smiles for her first job post-rehab this week.

In a preview clip from Monday's 'Chelsea Lately', in which the former child-star appears as a guest host, Lohan cracks jokes about Britain's very own Harry Styles.

Talking about the One Direction star's recent claim that he has only had sex with two people, Lohan laughs: "He obviously isn't counting oral."

Lohan also makes a jibe at Kristen Stewart for her recent confrontation with the paps, and from the clip above the 'Mean Girls' star looks happy and healthy after her court-ordered 90 day rehab stint. Have we finally got the old Lindsay back?

WATCH the video above.

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