Lindsay Lohan Brings The Laughs While Guest Hosting Chelsea Lately

Lindsay Lohan shot her guest-hosting gig on Chelsea Lately yesterday, and sources on set tell E! that the 27-year-old starlet arrived on time and did a great job during rehearsals. Maybe she has turned a new leaf after all!

Lilo wore an all-black ensemble, and apparently she "busted right through the opening monologue in one take, feeding off of the audience's energy and even poking fun at herself from time to time."

Once the taping was over, The Canyons starlet walked through the audience and thanked the crowd before taking photos with the crew backstage.

The episode will air on Monday, August 5 at 11:00pm ... can't wait to see our fav fiery-haired hottie back in fine form! Click thru for a shot of Lilo with Chuy...