Lindsay Lohan finished rehab and headed straight to Chelsea Lately!

But she wasn’t stopping by to get grilled on how her 90 days went, what she’s going to do differently to change her life, blah blah blah. No, she actually sat in Chelsea Handler’s chair and took over as guest host for the day and, according to sources, she actually kicked butt at it!

Related Article: Lindsay Lohan Signs $2 Million Deal With Oprah!

People on set tell E! Online that Lindsay arrived right on time and looked extremely happy and healthy on set. She “busted right through the opening monologue in one take," taking in all of the positive energy she was receiving from the audience.

While at the roundtable, she caught on some of this week’s biggest headlines, including Harry Styles’ sex life that was dished about in the latest issue of British GQ. Recalling how Harry squashed those bisexual rumors and that he’s only had sex with two people, Lindsay had this to say: “He’s obviously not hung out with The Wanted and obviously not counting oral. Sorry, Harry!” Um, ouch? But what can you expect from someone who’s "BFF’s" with Max George, right?

Lindsay’s episode of Chelsea Lately airs this Monday, August 5th at 11 PM EST on E!

Will you be tuning to see Lindsay take over hosting duties?